Question

solve for j in the proportion. $\frac{16}{40}=\frac{j}{45}$ j = □

Explanation:

Step1: Cross - multiply

$16\times45 = 40\times j$

Step2: Calculate the left - hand side

$16\times45=720$, so $720 = 40j$

Step3: Solve for $j$

$j=\frac{720}{40}$
$j = 18$

Answer:

18