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Finding the Fourth Proportional to 29,115.50, 40,137.03 and 20,591.06

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Solution

The fourth proportional to 29,115.50, 40,137.03 and 20,591.06 is: 28,385.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,115.50 : 40,137.03 = 20,591.06 : x
  2. Step 2: Convert to fraction form
    29,115.50/40,137.03 = 20,591.06/x
  3. Step 3: Cross multiply
    29,115.50x = 40,137.03 × 20,591.06
  4. Step 4: Simplify right side
    29,115.50x = 826,463,792.27
  5. Step 5: Solve for x
    x = 826,463,792.27/29,115.50
  6. Step 6: Final answer
    x = 28,385.70

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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.