We are given the following proportion:
[tex]\frac{3}{16}=\frac{x}{12}[/tex]To solve for "x" we first multiply by 12 on both sides:
[tex]3\times\frac{12}{16}=x\times\frac{12}{12}[/tex]Solving the operations:
[tex]\frac{36}{16}=x[/tex]Simplifying:
[tex]\frac{9}{4}=x[/tex]Therefore, x = 9/4