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Finding the Fourth Proportional to 7,308.80, 10,960.80 and 2,691.20

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Solution

The fourth proportional to 7,308.80, 10,960.80 and 2,691.20 is: 4,035.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,308.80 : 10,960.80 = 2,691.20 : x
  2. Step 2: Convert to fraction form
    7,308.80/10,960.80 = 2,691.20/x
  3. Step 3: Cross multiply
    7,308.80x = 10,960.80 × 2,691.20
  4. Step 4: Simplify right side
    7,308.80x = 29,497,704.96
  5. Step 5: Solve for x
    x = 29,497,704.96/7,308.80
  6. Step 6: Final answer
    x = 4,035.92

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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.