Home / 45,331.20-67,964.40-20,350.80

Finding the Fourth Proportional to 45,331.20, 67,964.40 and 20,350.80

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Solution

The fourth proportional to 45,331.20, 67,964.40 and 20,350.80 is: 30,511.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,331.20 : 67,964.40 = 20,350.80 : x
  2. Step 2: Convert to fraction form
    45,331.20/67,964.40 = 20,350.80/x
  3. Step 3: Cross multiply
    45,331.20x = 67,964.40 × 20,350.80
  4. Step 4: Simplify right side
    45,331.20x = 1,383,129,911.52
  5. Step 5: Solve for x
    x = 1,383,129,911.52/45,331.20
  6. Step 6: Final answer
    x = 30,511.65

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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.