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Finding the Fourth Proportional to 6,691.60, 9,234.16 and 3,859.09

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Solution

The fourth proportional to 6,691.60, 9,234.16 and 3,859.09 is: 5,325.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,691.60 : 9,234.16 = 3,859.09 : x
  2. Step 2: Convert to fraction form
    6,691.60/9,234.16 = 3,859.09/x
  3. Step 3: Cross multiply
    6,691.60x = 9,234.16 × 3,859.09
  4. Step 4: Simplify right side
    6,691.60x = 35,635,487.25
  5. Step 5: Solve for x
    x = 35,635,487.25/6,691.60
  6. Step 6: Final answer
    x = 5,325.41

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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.