if x/4=7/2 what is x

$${\frac{{\mathtt{x}}}{{\mathtt{4}}}}$$ = $${\frac{{\mathtt{7}}}{{\mathtt{2}}}}$$

This is a proportion, so you can cross-multiply:

2 * x = 4 * 7

2x = 28

Divide by 2:

x = 14