Home / 20,800.55-31,197.76-6,761.85

Finding the Fourth Proportional to 20,800.55, 31,197.76 and 6,761.85

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Solution

The fourth proportional to 20,800.55, 31,197.76 and 6,761.85 is: 10,141.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.55 : 31,197.76 = 6,761.85 : x
  2. Step 2: Convert to fraction form
    20,800.55/31,197.76 = 6,761.85/x
  3. Step 3: Cross multiply
    20,800.55x = 31,197.76 × 6,761.85
  4. Step 4: Simplify right side
    20,800.55x = 210,954,556.55
  5. Step 5: Solve for x
    x = 210,954,556.55/20,800.55
  6. Step 6: Final answer
    x = 10,141.78

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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.