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Finding the Fourth Proportional to 11,387.97, 15,715.11 and 6,351.99

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Solution

The fourth proportional to 11,387.97, 15,715.11 and 6,351.99 is: 8,765.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,387.97 : 15,715.11 = 6,351.99 : x
  2. Step 2: Convert to fraction form
    11,387.97/15,715.11 = 6,351.99/x
  3. Step 3: Cross multiply
    11,387.97x = 15,715.11 × 6,351.99
  4. Step 4: Simplify right side
    11,387.97x = 99,822,221.57
  5. Step 5: Solve for x
    x = 99,822,221.57/11,387.97
  6. Step 6: Final answer
    x = 8,765.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.