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Answered

Find the missing number (X) on the following proportions.

1. 96:4=X: 16
2. 1/4:4=8:X
3. X:168=9:108
4. 28:7=96:X
5. 15:45=1:X
6. 49:98=4:X
7. 9:X=15:60
8. X:7=186:56
9. 26:104=X:100
10. X33:X=7:63​

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Answer:

1. 96:4=X: 16

96(16) = 4x

1,536 = 4x

x= 1,536

4

x= 384

2. 1/4:4=8:X

1/4x = 4(8)

1/4x = 32

x = 32/0.25

x= 128

3. X:168=9:108

108x = 168(9)

108x = 1,512

x = 1,512 / 108

x = 14

4. 28:7=96:X

28x = 7(96)

28x = 672

x = 672 / 28

x = 24

5. 15:45=1:X

15x = 45(1)

15x = 45

x = 45 / 15

x = 3

6. 49:98=4:X

49x = 98(4)

49x = 392

x = 392 / 49

x = 8

7. 9:X=15:60

9(60) = 15x

540 = 15x

x = 540 / 15

x = 36

8. X:7=186:56

56x = 7(186)

56x = 1,302

x = 1,302 / 56

x = 23.25

9. 26:104=X:100

26(100) = 104x

2600 = 104x

x = 2600 / 104

x = 25

10. 33:X=7:63

33(63) = 7x

2,079 = 7x

x = 2,079 / 7

x = 297

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