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Finding the Fourth Proportional to 8,978,704.20, 13,468,056.30 and 6,286,069.80

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Solution

The fourth proportional to 8,978,704.20, 13,468,056.30 and 6,286,069.80 is: 9,429,104.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,978,704.20 : 13,468,056.30 = 6,286,069.80 : x
  2. Step 2: Convert to fraction form
    8,978,704.20/13,468,056.30 = 6,286,069.80/x
  3. Step 3: Cross multiply
    8,978,704.20x = 13,468,056.30 × 6,286,069.80
  4. Step 4: Simplify right side
    8,978,704.20x = 84,661,141,972,129.73
  5. Step 5: Solve for x
    x = 84,661,141,972,129.73/8,978,704.20
  6. Step 6: Final answer
    x = 9,429,104.70

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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.