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Finding the Fourth Proportional to 18,792,076.80, 28,188,115.20 and 15,432,844.80

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Solution

The fourth proportional to 18,792,076.80, 28,188,115.20 and 15,432,844.80 is: 23,149,267.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,792,076.80 : 28,188,115.20 = 15,432,844.80 : x
  2. Step 2: Convert to fraction form
    18,792,076.80/28,188,115.20 = 15,432,844.80/x
  3. Step 3: Cross multiply
    18,792,076.80x = 28,188,115.20 × 15,432,844.80
  4. Step 4: Simplify right side
    18,792,076.80x = 435,022,807,086,121
  5. Step 5: Solve for x
    x = 435,022,807,086,121/18,792,076.80
  6. Step 6: Final answer
    x = 23,149,267.20

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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.