Question

Find the value of x in given proportion 16 :x :: x :25
what is root and how can i use

Answer 1

16:x : : x:25

$\frac{16}{x} = \frac{x}{25}$

16*25 = x*x

400 = x²

20 = x

ANSWER is ; x = 20

(16:20 : : 20:25)

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explain -

20 * 20 = 400

it means 400 is the square root of 20.

x * x = x²

it means x² is the root of x.