Question

To solve for the following proportion, you could use equivalent ratios, divide out the known ratio, or use cross products. Choose one of these methods to solve for t. Show your work and explain why you chose that method
18 42
--- = ---
3 T

Answer 1

it is 18 over 3 and 42 over t

Answer 2

We can simply divide to find:
\[
\frac{18}{3}=6=\frac{42}{T}
\]So, we must divide 42 by 7 to receive 6, thus:
\[
T=7
\]

Answer 3

I like cross multiplying. Leaves you with 18T = 126 and you can just divide by 18.

Answer 4

It's more mechanical and easier, haha. But, yes, @smstevns 's response is much better to use, normally, unless you see something that could help or make the problem easier.