Home / 20,121.54-30,182.31-5,331.62

Finding the Fourth Proportional to 20,121.54, 30,182.31 and 5,331.62

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Solution

The fourth proportional to 20,121.54, 30,182.31 and 5,331.62 is: 7,997.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.54 : 30,182.31 = 5,331.62 : x
  2. Step 2: Convert to fraction form
    20,121.54/30,182.31 = 5,331.62/x
  3. Step 3: Cross multiply
    20,121.54x = 30,182.31 × 5,331.62
  4. Step 4: Simplify right side
    20,121.54x = 160,920,456.73
  5. Step 5: Solve for x
    x = 160,920,456.73/20,121.54
  6. Step 6: Final answer
    x = 7,997.42

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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.