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Finding the Fourth Proportional to 8,940.65, 13,419.80 and 6,711.73

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Solution

The fourth proportional to 8,940.65, 13,419.80 and 6,711.73 is: 10,074.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,940.65 : 13,419.80 = 6,711.73 : x
  2. Step 2: Convert to fraction form
    8,940.65/13,419.80 = 6,711.73/x
  3. Step 3: Cross multiply
    8,940.65x = 13,419.80 × 6,711.73
  4. Step 4: Simplify right side
    8,940.65x = 90,070,057.48
  5. Step 5: Solve for x
    x = 90,070,057.48/8,940.65
  6. Step 6: Final answer
    x = 10,074.22

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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.