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Finding the Fourth Proportional to 18,943,603.20, 28,415,404.80 and 8,306,035.20

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Solution

The fourth proportional to 18,943,603.20, 28,415,404.80 and 8,306,035.20 is: 12,459,052.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,943,603.20 : 28,415,404.80 = 8,306,035.20 : x
  2. Step 2: Convert to fraction form
    18,943,603.20/28,415,404.80 = 8,306,035.20/x
  3. Step 3: Cross multiply
    18,943,603.20x = 28,415,404.80 × 8,306,035.20
  4. Step 4: Simplify right side
    18,943,603.20x = 236,019,352,491,048.97
  5. Step 5: Solve for x
    x = 236,019,352,491,048.97/18,943,603.20
  6. Step 6: Final answer
    x = 12,459,052.80

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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.