Home / 20,581.13-30,872.90-5,791.20

Finding the Fourth Proportional to 20,581.13, 30,872.90 and 5,791.20

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Solution

The fourth proportional to 20,581.13, 30,872.90 and 5,791.20 is: 8,687.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.13 : 30,872.90 = 5,791.20 : x
  2. Step 2: Convert to fraction form
    20,581.13/30,872.90 = 5,791.20/x
  3. Step 3: Cross multiply
    20,581.13x = 30,872.90 × 5,791.20
  4. Step 4: Simplify right side
    20,581.13x = 178,791,138.48
  5. Step 5: Solve for x
    x = 178,791,138.48/20,581.13
  6. Step 6: Final answer
    x = 8,687.14

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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.