Question

solve for c in the proportion.
$\frac{5}{13}=\frac{c}{7.8}$
$c = square$

Explanation:

Step1: Cross - multiply

$5\times7.8 = 13\times c$

Step2: Calculate the left - hand side

$5\times7.8=39$, so $39 = 13c$

Step3: Solve for c

$c=\frac{39}{13}$

Answer:

$3$