Home / 20,778.18-31,167.30-5,195.82

Finding the Fourth Proportional to 20,778.18, 31,167.30 and 5,195.82

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Solution

The fourth proportional to 20,778.18, 31,167.30 and 5,195.82 is: 7,793.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.18 : 31,167.30 = 5,195.82 : x
  2. Step 2: Convert to fraction form
    20,778.18/31,167.30 = 5,195.82/x
  3. Step 3: Cross multiply
    20,778.18x = 31,167.30 × 5,195.82
  4. Step 4: Simplify right side
    20,778.18x = 161,939,680.69
  5. Step 5: Solve for x
    x = 161,939,680.69/20,778.18
  6. Step 6: Final answer
    x = 7,793.74

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1.5x scale

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.