The two rectangles are similar find the length of side x the smaller one has a width of 4 and a length of 16 then the enlarged one has a width of 8 and a length of x how would I do this?
The easy way is to realize that to keep the proportion,
if you double the width, you also have to double the length.
Answer: length = twice 16 or 32.
The harder way (but the only way for harder problems),
is to set up a proportion:
Cross-multiply:
-----------------------------------
You can also set up the proportion this way:
Cross-multiply:
Answer: length of larger rectangle = x = 32
Edwin