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Finding the Fourth Proportional to 7,339.97, 10,129.20 and 3,982.79

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Solution

The fourth proportional to 7,339.97, 10,129.20 and 3,982.79 is: 5,496.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,339.97 : 10,129.20 = 3,982.79 : x
  2. Step 2: Convert to fraction form
    7,339.97/10,129.20 = 3,982.79/x
  3. Step 3: Cross multiply
    7,339.97x = 10,129.20 × 3,982.79
  4. Step 4: Simplify right side
    7,339.97x = 40,342,476.47
  5. Step 5: Solve for x
    x = 40,342,476.47/7,339.97
  6. Step 6: Final answer
    x = 5,496.27

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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.