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Finding the Fourth Proportional to 8,641,036.90, 12,936,672.15 and 8,392,204.90

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Solution

The fourth proportional to 8,641,036.90, 12,936,672.15 and 8,392,204.90 is: 12,564,140.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,641,036.90 : 12,936,672.15 = 8,392,204.90 : x
  2. Step 2: Convert to fraction form
    8,641,036.90/12,936,672.15 = 8,392,204.90/x
  3. Step 3: Cross multiply
    8,641,036.90x = 12,936,672.15 × 8,392,204.90
  4. Step 4: Simplify right side
    8,641,036.90x = 108,567,203,406,923.55
  5. Step 5: Solve for x
    x = 108,567,203,406,923.55/8,641,036.90
  6. Step 6: Final answer
    x = 12,564,140.70

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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.