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Finding the Fourth Proportional to 7,129.73, 9,838.96 and 3,943.17

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Solution

The fourth proportional to 7,129.73, 9,838.96 and 3,943.17 is: 5,441.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.73 : 9,838.96 = 3,943.17 : x
  2. Step 2: Convert to fraction form
    7,129.73/9,838.96 = 3,943.17/x
  3. Step 3: Cross multiply
    7,129.73x = 9,838.96 × 3,943.17
  4. Step 4: Simplify right side
    7,129.73x = 38,796,691.90
  5. Step 5: Solve for x
    x = 38,796,691.90/7,129.73
  6. Step 6: Final answer
    x = 5,441.54

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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.