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Finding the Fourth Proportional to 8,659,418.80, 12,986,066.40 and 2,978,321.80

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Solution

The fourth proportional to 8,659,418.80, 12,986,066.40 and 2,978,321.80 is: 4,466,429.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,659,418.80 : 12,986,066.40 = 2,978,321.80 : x
  2. Step 2: Convert to fraction form
    8,659,418.80/12,986,066.40 = 2,978,321.80/x
  3. Step 3: Cross multiply
    8,659,418.80x = 12,986,066.40 × 2,978,321.80
  4. Step 4: Simplify right side
    8,659,418.80x = 38,676,684,655,367.52
  5. Step 5: Solve for x
    x = 38,676,684,655,367.52/8,659,418.80
  6. Step 6: Final answer
    x = 4,466,429.62

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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.