Home / 20,331.15-30,491.19-7,181.88

Finding the Fourth Proportional to 20,331.15, 30,491.19 and 7,181.88

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Solution

The fourth proportional to 20,331.15, 30,491.19 and 7,181.88 is: 10,770.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,331.15 : 30,491.19 = 7,181.88 : x
  2. Step 2: Convert to fraction form
    20,331.15/30,491.19 = 7,181.88/x
  3. Step 3: Cross multiply
    20,331.15x = 30,491.19 × 7,181.88
  4. Step 4: Simplify right side
    20,331.15x = 218,984,067.64
  5. Step 5: Solve for x
    x = 218,984,067.64/20,331.15
  6. Step 6: Final answer
    x = 10,770.86

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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.