Home / 20,729.40-31,097.52-8,249.50

Finding the Fourth Proportional to 20,729.40, 31,097.52 and 8,249.50

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Solution

The fourth proportional to 20,729.40, 31,097.52 and 8,249.50 is: 12,375.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.40 : 31,097.52 = 8,249.50 : x
  2. Step 2: Convert to fraction form
    20,729.40/31,097.52 = 8,249.50/x
  3. Step 3: Cross multiply
    20,729.40x = 31,097.52 × 8,249.50
  4. Step 4: Simplify right side
    20,729.40x = 256,538,991.24
  5. Step 5: Solve for x
    x = 256,538,991.24/20,729.40
  6. Step 6: Final answer
    x = 12,375.61

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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.