Home / 20,732.76-31,111.19-8,724.03

Finding the Fourth Proportional to 20,732.76, 31,111.19 and 8,724.03

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Solution

The fourth proportional to 20,732.76, 31,111.19 and 8,724.03 is: 13,091.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,732.76 : 31,111.19 = 8,724.03 : x
  2. Step 2: Convert to fraction form
    20,732.76/31,111.19 = 8,724.03/x
  3. Step 3: Cross multiply
    20,732.76x = 31,111.19 × 8,724.03
  4. Step 4: Simplify right side
    20,732.76x = 271,414,794.61
  5. Step 5: Solve for x
    x = 271,414,794.61/20,732.76
  6. Step 6: Final answer
    x = 13,091.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.