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Finding the Fourth Proportional to 8,658,657.76, 12,987,850.56 and 2,978,931.28

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Solution

The fourth proportional to 8,658,657.76, 12,987,850.56 and 2,978,931.28 is: 4,468,350.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658,657.76 : 12,987,850.56 = 2,978,931.28 : x
  2. Step 2: Convert to fraction form
    8,658,657.76/12,987,850.56 = 2,978,931.28/x
  3. Step 3: Cross multiply
    8,658,657.76x = 12,987,850.56 × 2,978,931.28
  4. Step 4: Simplify right side
    8,658,657.76x = 38,689,914,293,149.52
  5. Step 5: Solve for x
    x = 38,689,914,293,149.52/8,658,657.76
  6. Step 6: Final answer
    x = 4,468,350.10

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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.