Home / 20,697.92-31,046.57-5,115.54

Finding the Fourth Proportional to 20,697.92, 31,046.57 and 5,115.54

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Solution

The fourth proportional to 20,697.92, 31,046.57 and 5,115.54 is: 7,673.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,697.92 : 31,046.57 = 5,115.54 : x
  2. Step 2: Convert to fraction form
    20,697.92/31,046.57 = 5,115.54/x
  3. Step 3: Cross multiply
    20,697.92x = 31,046.57 × 5,115.54
  4. Step 4: Simplify right side
    20,697.92x = 158,819,970.70
  5. Step 5: Solve for x
    x = 158,819,970.70/20,697.92
  6. Step 6: Final answer
    x = 7,673.23

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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.