Home / 13,157.89-18,170.02-8,450.38

Finding the Fourth Proportional to 13,157.89, 18,170.02 and 8,450.38

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Solution

The fourth proportional to 13,157.89, 18,170.02 and 8,450.38 is: 11,669.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,157.89 : 18,170.02 = 8,450.38 : x
  2. Step 2: Convert to fraction form
    13,157.89/18,170.02 = 8,450.38/x
  3. Step 3: Cross multiply
    13,157.89x = 18,170.02 × 8,450.38
  4. Step 4: Simplify right side
    13,157.89x = 153,543,440.51
  5. Step 5: Solve for x
    x = 153,543,440.51/13,157.89
  6. Step 6: Final answer
    x = 11,669.30

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.