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Finding the Fourth Proportional to 20,246,463.20, 30,369,694.80 and 18,687,569.60

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Solution

The fourth proportional to 20,246,463.20, 30,369,694.80 and 18,687,569.60 is: 28,031,354.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,246,463.20 : 30,369,694.80 = 18,687,569.60 : x
  2. Step 2: Convert to fraction form
    20,246,463.20/30,369,694.80 = 18,687,569.60/x
  3. Step 3: Cross multiply
    20,246,463.20x = 30,369,694.80 × 18,687,569.60
  4. Step 4: Simplify right side
    20,246,463.20x = 567,535,785,305,758.12
  5. Step 5: Solve for x
    x = 567,535,785,305,758.12/20,246,463.20
  6. Step 6: Final answer
    x = 28,031,354.40

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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.