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Finding the Fourth Proportional to 40,487.57, 60,731.38 and 20,753.54

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Solution

The fourth proportional to 40,487.57, 60,731.38 and 20,753.54 is: 31,130.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,487.57 : 60,731.38 = 20,753.54 : x
  2. Step 2: Convert to fraction form
    40,487.57/60,731.38 = 20,753.54/x
  3. Step 3: Cross multiply
    40,487.57x = 60,731.38 × 20,753.54
  4. Step 4: Simplify right side
    40,487.57x = 1,260,391,124.09
  5. Step 5: Solve for x
    x = 1,260,391,124.09/40,487.57
  6. Step 6: Final answer
    x = 31,130.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.