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Finding the Fourth Proportional to 5,127.40, 7,691.10 and 4,738.60

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Solution

The fourth proportional to 5,127.40, 7,691.10 and 4,738.60 is: 7,107.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,127.40 : 7,691.10 = 4,738.60 : x
  2. Step 2: Convert to fraction form
    5,127.40/7,691.10 = 4,738.60/x
  3. Step 3: Cross multiply
    5,127.40x = 7,691.10 × 4,738.60
  4. Step 4: Simplify right side
    5,127.40x = 36,445,046.46
  5. Step 5: Solve for x
    x = 36,445,046.46/5,127.40
  6. Step 6: Final answer
    x = 7,107.90

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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.