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Finding the Fourth Proportional to 20,219.70, 30,324.15 and 6,179.70

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Solution

The fourth proportional to 20,219.70, 30,324.15 and 6,179.70 is: 9,267.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,219.70 : 30,324.15 = 6,179.70 : x
  2. Step 2: Convert to fraction form
    20,219.70/30,324.15 = 6,179.70/x
  3. Step 3: Cross multiply
    20,219.70x = 30,324.15 × 6,179.70
  4. Step 4: Simplify right side
    20,219.70x = 187,394,149.76
  5. Step 5: Solve for x
    x = 187,394,149.76/20,219.70
  6. Step 6: Final answer
    x = 9,267.90

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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.