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Finding the Fourth Proportional to 8,555,691.38, 12,836,396.64 and 2,798,687.66

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Solution

The fourth proportional to 8,555,691.38, 12,836,396.64 and 2,798,687.66 is: 4,198,966.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,555,691.38 : 12,836,396.64 = 2,798,687.66 : x
  2. Step 2: Convert to fraction form
    8,555,691.38/12,836,396.64 = 2,798,687.66/x
  3. Step 3: Cross multiply
    8,555,691.38x = 12,836,396.64 × 2,798,687.66
  4. Step 4: Simplify right side
    8,555,691.38x = 35,925,064,875,233.47
  5. Step 5: Solve for x
    x = 35,925,064,875,233.47/8,555,691.38
  6. Step 6: Final answer
    x = 4,198,966.90

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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.