From the figure, we can say:
[tex]\Delta\text{HGI\textasciitilde}\Delta\text{HFJ}[/tex]
Since both the triangles are similar, their sides are proportional.
We can write a proportional ratio:
[tex]\frac{3}{6}=\frac{y}{8}[/tex]
We can cross multiply and solve for y:
[tex]\begin{gathered} \frac{3}{6}=\frac{y}{8} \\ 6y=3\times8 \\ 6y=24 \\ y=\frac{24}{6} \\ y=4 \end{gathered}[/tex]
