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Finding the Fourth Proportional to 8,940.35, 13,419.35 and 6,711.43

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Solution

The fourth proportional to 8,940.35, 13,419.35 and 6,711.43 is: 10,073.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,940.35 : 13,419.35 = 6,711.43 : x
  2. Step 2: Convert to fraction form
    8,940.35/13,419.35 = 6,711.43/x
  3. Step 3: Cross multiply
    8,940.35x = 13,419.35 × 6,711.43
  4. Step 4: Simplify right side
    8,940.35x = 90,063,078.50
  5. Step 5: Solve for x
    x = 90,063,078.50/8,940.35
  6. Step 6: Final answer
    x = 10,073.78

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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.