Home / 20,753.31-28,639.67-11,321.88

Finding the Fourth Proportional to 20,753.31, 28,639.67 and 11,321.88

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Solution

The fourth proportional to 20,753.31, 28,639.67 and 11,321.88 is: 15,624.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,753.31 : 28,639.67 = 11,321.88 : x
  2. Step 2: Convert to fraction form
    20,753.31/28,639.67 = 11,321.88/x
  3. Step 3: Cross multiply
    20,753.31x = 28,639.67 × 11,321.88
  4. Step 4: Simplify right side
    20,753.31x = 324,254,906.98
  5. Step 5: Solve for x
    x = 324,254,906.98/20,753.31
  6. Step 6: Final answer
    x = 15,624.25

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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.