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Finding the Fourth Proportional to 7,073.55, 9,761.31 and 3,929.53

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Solution

The fourth proportional to 7,073.55, 9,761.31 and 3,929.53 is: 5,422.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,073.55 : 9,761.31 = 3,929.53 : x
  2. Step 2: Convert to fraction form
    7,073.55/9,761.31 = 3,929.53/x
  3. Step 3: Cross multiply
    7,073.55x = 9,761.31 × 3,929.53
  4. Step 4: Simplify right side
    7,073.55x = 38,357,360.48
  5. Step 5: Solve for x
    x = 38,357,360.48/7,073.55
  6. Step 6: Final answer
    x = 5,422.65

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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.