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Finding the Fourth Proportional to 20,152.80, 30,229.20 and 15,481.80

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Solution

The fourth proportional to 20,152.80, 30,229.20 and 15,481.80 is: 23,222.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,152.80 : 30,229.20 = 15,481.80 : x
  2. Step 2: Convert to fraction form
    20,152.80/30,229.20 = 15,481.80/x
  3. Step 3: Cross multiply
    20,152.80x = 30,229.20 × 15,481.80
  4. Step 4: Simplify right side
    20,152.80x = 468,002,428.56
  5. Step 5: Solve for x
    x = 468,002,428.56/20,152.80
  6. Step 6: Final answer
    x = 23,222.70

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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.