Question

Find the value of $x$, so that $x,60,3,20$ are proportion.

Answer 1

$x:60:3:20$

$\Rightarrow \frac{x}{60}=\frac{3}{20}$

$\Rightarrow 20x=60\times 3$

$\Rightarrow 20x=180$

$\Rightarrow x=\frac{180}{20}$

$\therefore x=9$.