Question

solve the proportion15/a=3/2

Answer 1

$\frac{15}{a}=\frac{3}{2}$

to solve for a we have to cross multiply,

$\begin{gathered} \frac{15}{a}=\frac{3}{2} \\ 15(2)=3(a) \\ 30=3a \\ \frac{30}{3}=\frac{3a}{3} \\ 10=a \\ a=10 \end{gathered}$

Answer: a = 10