Question

Find $x$, if $4,12,x,18$ are in proportion.

Answer 1

Given, $\frac{4}{x}=\frac{12}{18}$

$\Rightarrow \frac{4}{x}=\frac{2}{3}$

$\Rightarrow x=\frac{12}{2}$

$\Rightarrow x=6$.