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Finding the Fourth Proportional to 9,175.57, 12,660.11 and 5,398.90

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Solution

The fourth proportional to 9,175.57, 12,660.11 and 5,398.90 is: 7,449.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,175.57 : 12,660.11 = 5,398.90 : x
  2. Step 2: Convert to fraction form
    9,175.57/12,660.11 = 5,398.90/x
  3. Step 3: Cross multiply
    9,175.57x = 12,660.11 × 5,398.90
  4. Step 4: Simplify right side
    9,175.57x = 68,350,609.23
  5. Step 5: Solve for x
    x = 68,350,609.23/9,175.57
  6. Step 6: Final answer
    x = 7,449.20

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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.