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Finding the Fourth Proportional to 20,487.30, 30,730.95 and 16,793.70

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Solution

The fourth proportional to 20,487.30, 30,730.95 and 16,793.70 is: 25,190.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.30 : 30,730.95 = 16,793.70 : x
  2. Step 2: Convert to fraction form
    20,487.30/30,730.95 = 16,793.70/x
  3. Step 3: Cross multiply
    20,487.30x = 30,730.95 × 16,793.70
  4. Step 4: Simplify right side
    20,487.30x = 516,086,355.02
  5. Step 5: Solve for x
    x = 516,086,355.02/20,487.30
  6. Step 6: Final answer
    x = 25,190.55

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1.5x scale

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.