Question

lf 9:5 : : x : 20, find the value of x .

Answer 1

$9:5 = x:20 \\ \\ \frac{9}{5} = \frac{x}{20} \\ \\ 5x = 9 \times 20 = 180 \\ \\ x = \frac{180}{5} = 36$

36 is the answer.

Answer 2

5×X=9×20

X=9×20/5

X=9×4=36

so the value of X=36 .