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Finding the Fourth Proportional to 7,387.92, 11,049.48 and 6,428.88

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Solution

The fourth proportional to 7,387.92, 11,049.48 and 6,428.88 is: 9,615.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,387.92 : 11,049.48 = 6,428.88 : x
  2. Step 2: Convert to fraction form
    7,387.92/11,049.48 = 6,428.88/x
  3. Step 3: Cross multiply
    7,387.92x = 11,049.48 × 6,428.88
  4. Step 4: Simplify right side
    7,387.92x = 71,035,780.98
  5. Step 5: Solve for x
    x = 71,035,780.98/7,387.92
  6. Step 6: Final answer
    x = 9,615.13

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1.5x scale

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.