Home / 20,863.86-31,296.60-5,281.89

Finding the Fourth Proportional to 20,863.86, 31,296.60 and 5,281.89

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Solution

The fourth proportional to 20,863.86, 31,296.60 and 5,281.89 is: 7,923.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,863.86 : 31,296.60 = 5,281.89 : x
  2. Step 2: Convert to fraction form
    20,863.86/31,296.60 = 5,281.89/x
  3. Step 3: Cross multiply
    20,863.86x = 31,296.60 × 5,281.89
  4. Step 4: Simplify right side
    20,863.86x = 165,305,198.57
  5. Step 5: Solve for x
    x = 165,305,198.57/20,863.86
  6. Step 6: Final answer
    x = 7,923.04

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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.