Question

If 3:y=18:24 find y.

Answer 1

y = 4

Step-by-step explanation:
`\begin{gathered} 3\text{ : y = 18 : 24} \\ 3\colon y\text{ = }(3)/(y) \\ 18\colon24\text{ = }(18)/(24) \end{gathered}`
`\begin{gathered} (3)/(y)\text{ = }(18)/(24) \\ \text{cross mult}iply\colon \\ 3(24)\text{ = y(18)} \\ \text{divide both sides by 18:} \\ (3(24))/(18)\text{ = }(18y)/(18) \end{gathered}`
`\begin{gathered} y\text{ = }(24)/(6) \\ y\text{ = 4} \end{gathered}`