Question

Resolva as proporçoes x/3=4/12,
2x/24=36/9

Answer 1

$x/3=4/12\\ x=12/12=1\\\\ 2x/24=36/9\\ x=(36*24)/(9*2)=48$

Answer 2

$\frac{x}{3}$ = $\frac{4}{12}$
multiplica em cruz
12x = 3.4
12x = 12
x = $\frac{12}{12}$
x =1

$\frac{2x}{24}$ = $\frac{36}{9}$

9.2x = 24.36
18x = 864
x = $\frac{12}{12}$
x = 48