Home / 20,761.31-28,650.61-11,329.88

Finding the Fourth Proportional to 20,761.31, 28,650.61 and 11,329.88

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Solution

The fourth proportional to 20,761.31, 28,650.61 and 11,329.88 is: 15,635.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,761.31 : 28,650.61 = 11,329.88 : x
  2. Step 2: Convert to fraction form
    20,761.31/28,650.61 = 11,329.88/x
  3. Step 3: Cross multiply
    20,761.31x = 28,650.61 × 11,329.88
  4. Step 4: Simplify right side
    20,761.31x = 324,607,844.14
  5. Step 5: Solve for x
    x = 324,607,844.14/20,761.31
  6. Step 6: Final answer
    x = 15,635.23

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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.