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Finding the Fourth Proportional to 8,815,515.20, 13,198,389.60 and 8,815,515.20

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Solution

The fourth proportional to 8,815,515.20, 13,198,389.60 and 8,815,515.20 is: 13,198,389.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,815,515.20 : 13,198,389.60 = 8,815,515.20 : x
  2. Step 2: Convert to fraction form
    8,815,515.20/13,198,389.60 = 8,815,515.20/x
  3. Step 3: Cross multiply
    8,815,515.20x = 13,198,389.60 × 8,815,515.20
  4. Step 4: Simplify right side
    8,815,515.20x = 116,350,604,134,321.91
  5. Step 5: Solve for x
    x = 116,350,604,134,321.91/8,815,515.20
  6. Step 6: Final answer
    x = 13,198,389.60

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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.