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Finding the Fourth Proportional to 8,659,411.30, 12,986,055.15 and 2,978,314.30

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Solution

The fourth proportional to 8,659,411.30, 12,986,055.15 and 2,978,314.30 is: 4,466,418.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,659,411.30 : 12,986,055.15 = 2,978,314.30 : x
  2. Step 2: Convert to fraction form
    8,659,411.30/12,986,055.15 = 2,978,314.30/x
  3. Step 3: Cross multiply
    8,659,411.30x = 12,986,055.15 × 2,978,314.30
  4. Step 4: Simplify right side
    8,659,411.30x = 38,676,553,753,833.64
  5. Step 5: Solve for x
    x = 38,676,553,753,833.64/8,659,411.30
  6. Step 6: Final answer
    x = 4,466,418.38

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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.