What is the fourth proportional to √6, √8, and √21?

Find the mean proportional of 36 and 100.   

The third proportion between 25 and 35 is:

Find the mean proportional of 12.96 and 0.16.

The ratio of the third proportional to 16 & 40 and the mean proportional between 10 & 40 is:

Determine the fourth proportional to 11.6 m, 9.2 m, 32.8 m. (Consider up to two decimals)

The fourth proportion of number 8, 20 and 15 is:

If 48 : b : : b : 75, and b > 0, find the value of b.

If 40: 35:: 35: x, find the value of x.

Find the third proportion of 6 and 12.

The mean proportional between 0.04 and 0.36 is:

Find the third proportion of P and 12, when 8, P, 16 and 18 are in proportion.

Find the third proportional to 23 and 31.

What should be subtracted from 3, 7, 4, and 6 so that they are in proportion?

What is the ratio of the mean proportional between 1.6 and 3.6 and the third proportional of 5 and 8?

If (x + 1) : (x + 5) :: (x + 17) : (x + 53) then what is the mean proportional between (x + 5) and (9x−1) where x > 0?

Find the third proportional to 8 and 20.

When x is subtracted from each of 28, 34, 70, and 88, the obtained number remains in proportion. What is the mean proportion of (6x + 3) and (2x +6)?

Find the mean proportional of (x + y)⁴ and (x - y)⁴.

The third proportional to (x² - y²) and (x - y) is:

If the third proportional to 8 and 24 is 'A' and the mean proportional of 4 and 16 is 'B', then the value of \(\frac{A}{B}\) is:

Find the mean proportional of 36 and 100.   

Find the mean proportional of (x + y)⁴ and (x - y)⁴.

Find the mean proportion of 3 and 27. 

When x is subtracted from each of 28, 34, 70, and 88, the obtained number remains in proportion. What is the mean proportion of (6x + 3) and (2x +6)?

M varies inversely as (N² + 3). If M = 3 when N = 3, then what will be the value of M when N² = 69?

If (x + 1) : (x + 5) :: (x + 17) : (x + 53) then what is the mean proportional between (x + 5) and (9x−1) where x > 0?

The value of x in the proportion equation 5 : 12 :: 9 : x is:

The third proportional to 18 and 72 is:

Find the mean proportional between 3 and 27.

Find the mean proportional between 32 and 162.

Find the third proportional to 23 and 31.

The ratio of the third proportional to 16 & 40 and the mean proportional between 10 & 40 is:

M varies inversely as (N² + 3). If M = 3 when N = 3, then what will be the value of M when N² = 69?

What is the value of x, if 3 : 8 :: x : 12?

What is the fourth proportion of 13, 23, and 871?

If 9 : 12 :: 12 : x, and 28 : 42 :: 42 : y, then the value of 2x + y is:

What is the fourth proportional to √6, √8, and √21?

If 42, 36, and 35 are the first three terms of a proportion, then the fourth term is:

What is the fourth proportion of 12, 42, 50?

The mean proportional between 0.03 and 0.0003 is:

Find the fourth proportion of the numbers 10 : 5 :: 4 : x.

If X is the third proportional to 32 and 88 and Y is the mean proportional to 63 and 343. What is (X - Y)²?