Home / 20,882.60-31,322.46-9,791.75

Finding the Fourth Proportional to 20,882.60, 31,322.46 and 9,791.75

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Solution

The fourth proportional to 20,882.60, 31,322.46 and 9,791.75 is: 14,686.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,882.60 : 31,322.46 = 9,791.75 : x
  2. Step 2: Convert to fraction form
    20,882.60/31,322.46 = 9,791.75/x
  3. Step 3: Cross multiply
    20,882.60x = 31,322.46 × 9,791.75
  4. Step 4: Simplify right side
    20,882.60x = 306,701,697.71
  5. Step 5: Solve for x
    x = 306,701,697.71/20,882.60
  6. Step 6: Final answer
    x = 14,686.95

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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.