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Finding the Fourth Proportional to 20,581.70, 30,873.90 and 5,791.10

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Solution

The fourth proportional to 20,581.70, 30,873.90 and 5,791.10 is: 8,687.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.70 : 30,873.90 = 5,791.10 : x
  2. Step 2: Convert to fraction form
    20,581.70/30,873.90 = 5,791.10/x
  3. Step 3: Cross multiply
    20,581.70x = 30,873.90 × 5,791.10
  4. Step 4: Simplify right side
    20,581.70x = 178,793,842.29
  5. Step 5: Solve for x
    x = 178,793,842.29/20,581.70
  6. Step 6: Final answer
    x = 8,687.03

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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.