Question

Find the value of $x$, if the following is in proportion: $x,6,10,15$.

Answer 1

Find the value of $x$:

Since $x,6,10,15$ are in proportion,

So, $x:6::10:15$

$\Rightarrow \frac{x}{6}=\frac{10}{15}$

$\Rightarrow 15x=10\times 6$

$\Rightarrow x=\frac{10\times 6}{15}$

$\Rightarrow x=4$

Hence, the value of $x$is 4.