\( \dfrac{\square}{45} = \dfrac{16}{40} = \dfrac{24}{\square} \)
\( \dfrac{18}{45} = \dfrac{16}{40} = \dfrac{24}{60} \)
\(\dfrac{16}{40} = \dfrac{2}{5}\). For \(x/45 = 2/5\), \(x=18\). For \(24/y = 2/5\), \(y=60\).