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Finding the Fourth Proportional to 39,872.70, 59,809.05 and 16,515.90

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Solution

The fourth proportional to 39,872.70, 59,809.05 and 16,515.90 is: 24,773.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,872.70 : 59,809.05 = 16,515.90 : x
  2. Step 2: Convert to fraction form
    39,872.70/59,809.05 = 16,515.90/x
  3. Step 3: Cross multiply
    39,872.70x = 59,809.05 × 16,515.90
  4. Step 4: Simplify right side
    39,872.70x = 987,800,288.90
  5. Step 5: Solve for x
    x = 987,800,288.90/39,872.70
  6. Step 6: Final answer
    x = 24,773.85

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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.