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Finding the Fourth Proportional to 18,687,621.90, 28,031,432.85 and 18,687,621.90

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Solution

The fourth proportional to 18,687,621.90, 28,031,432.85 and 18,687,621.90 is: 28,031,432.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687,621.90 : 28,031,432.85 = 18,687,621.90 : x
  2. Step 2: Convert to fraction form
    18,687,621.90/28,031,432.85 = 18,687,621.90/x
  3. Step 3: Cross multiply
    18,687,621.90x = 28,031,432.85 × 18,687,621.90
  4. Step 4: Simplify right side
    18,687,621.90x = 523,840,818,416,039.38
  5. Step 5: Solve for x
    x = 523,840,818,416,039.38/18,687,621.90
  6. Step 6: Final answer
    x = 28,031,432.85

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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.