Find the value of x, if 2, 16, 5 and x are in proportion.

Find the value of x if: a. x, 7,9, 21 are in proportion. b. 6, 15, 8, x are in proportion.

Find x iff 2,7,5 ((x)/(2)) are in proportion.

Find the value of x in the following proportion. 22.5:x::17.5:7

Find the value of x of equation x^2=16

If 3, 8, x and 16 are in proportion the value of x is

Find the value of x of equation 4x^2=16

Find the value of x in the following proportions: 2/7=4/x and 7:3::x:12

x is the 4th proportional to 12, 16 and 5, and 20, y, 15, 21 are in proportion. Then the value of (6x-y) is: x, 12, 16 और 15 का चौथा समानुपाती है , तथा 20, y, 15, 21 समानुपात में हैं |(6x-y) का मान है :

If 4, x, 12, 15 are in proportion. Find the value of x.