Name ____________________
Date __________________
Use a proportion to find the unknown length.
ED = 4
DC = 5
CE = 8
JI = 36
IH =
HJ = 72
Solution Step 1:
Using the proportion, ED:JI = 4:36 = 1 : 9
Also, CE:HJ = 1 : 9
Solution Step 2:
Applying the same proportion for DC:IH,
DC=5; DC:IH = 1 : 9
So, IH = 45
Answer: IH = 45
Try two practice problems:
A.
UR = 6
RS = 18
ST = 3
TU = 21
DE = 2
EF = 6
FG =
GD =
B.
ED = 5
DC = 6
JI = 25
HJ = 40
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