What formula would this be?If XQ=9 YQ=12 QV=4 Then QW=

Explanation
If XQ=9 YQ=12 QV=4, We can use the intersecting secant theorem to find QW below.
[tex]\begin{gathered} XQ\times QV=YQ\times QW \\ QW=\frac{XQ\times YQ}{YQ} \\ QW=\frac{9\times4}{12}=\frac{36}{12}=3 \end{gathered}[/tex]Answer: 3