Home / 20,321.28-30,481.11-7,835.94

Finding the Fourth Proportional to 20,321.28, 30,481.11 and 7,835.94

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Solution

The fourth proportional to 20,321.28, 30,481.11 and 7,835.94 is: 11,753.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,321.28 : 30,481.11 = 7,835.94 : x
  2. Step 2: Convert to fraction form
    20,321.28/30,481.11 = 7,835.94/x
  3. Step 3: Cross multiply
    20,321.28x = 30,481.11 × 7,835.94
  4. Step 4: Simplify right side
    20,321.28x = 238,848,149.09
  5. Step 5: Solve for x
    x = 238,848,149.09/20,321.28
  6. Step 6: Final answer
    x = 11,753.60

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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.