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Finding the Fourth Proportional to 13,793.89, 20,687.19 and 3,933.73

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Solution

The fourth proportional to 13,793.89, 20,687.19 and 3,933.73 is: 5,899.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,793.89 : 20,687.19 = 3,933.73 : x
  2. Step 2: Convert to fraction form
    13,793.89/20,687.19 = 3,933.73/x
  3. Step 3: Cross multiply
    13,793.89x = 20,687.19 × 3,933.73
  4. Step 4: Simplify right side
    13,793.89x = 81,377,819.92
  5. Step 5: Solve for x
    x = 81,377,819.92/13,793.89
  6. Step 6: Final answer
    x = 5,899.56

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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.