Question

$\frac{1}{2} = \frac{x}{9}$

Explanation:

Step1: Cross - multiply the proportion

For the proportion $\frac{1}{2}=\frac{x}{9}$, cross - multiplying gives us $2\times x = 1\times9$.

Step2: Solve for x

We have the equation $2x = 9$. To solve for $x$, we divide both sides of the equation by 2. So $x=\frac{9}{2}=4.5$.

Answer:

$x = \frac{9}{2}$ (or $x = 4.5$)