Help please, If you answer can you explain it to me, thank you

I believe it's 27.

Step-by-step explanation:

So I write out the ratio 4:36 and 3:?. In ratios there is a pattern. To find it, I divided 36 by 4/3. Here's something I found from www.math.com that might explain it nicely: To find an equal ratio, you can either multiply or divide each term in the ratio by the same number (but not zero). For example, if we divide both terms in the ratio 3:6 by the number three, then we get the equal ratio, 1:2. Do you see that these ratios both represent the same comparison?

Hope this helps!