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Finding the Fourth Proportional to 20,793.70, 28,697.16 and 11,839.24

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Solution

The fourth proportional to 20,793.70, 28,697.16 and 11,839.24 is: 16,339.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,793.70 : 28,697.16 = 11,839.24 : x
  2. Step 2: Convert to fraction form
    20,793.70/28,697.16 = 11,839.24/x
  3. Step 3: Cross multiply
    20,793.70x = 28,697.16 × 11,839.24
  4. Step 4: Simplify right side
    20,793.70x = 339,752,564.56
  5. Step 5: Solve for x
    x = 339,752,564.56/20,793.70
  6. Step 6: Final answer
    x = 16,339.21

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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.