Home / 20,800.53-31,201.20-5,217.75

Finding the Fourth Proportional to 20,800.53, 31,201.20 and 5,217.75

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Solution

The fourth proportional to 20,800.53, 31,201.20 and 5,217.75 is: 7,826.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.53 : 31,201.20 = 5,217.75 : x
  2. Step 2: Convert to fraction form
    20,800.53/31,201.20 = 5,217.75/x
  3. Step 3: Cross multiply
    20,800.53x = 31,201.20 × 5,217.75
  4. Step 4: Simplify right side
    20,800.53x = 162,800,061.30
  5. Step 5: Solve for x
    x = 162,800,061.30/20,800.53
  6. Step 6: Final answer
    x = 7,826.73

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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.