Home / 28,481.62-42,731.09-20,177.70

Finding the Fourth Proportional to 28,481.62, 42,731.09 and 20,177.70

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Solution

The fourth proportional to 28,481.62, 42,731.09 and 20,177.70 is: 30,272.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,481.62 : 42,731.09 = 20,177.70 : x
  2. Step 2: Convert to fraction form
    28,481.62/42,731.09 = 20,177.70/x
  3. Step 3: Cross multiply
    28,481.62x = 42,731.09 × 20,177.70
  4. Step 4: Simplify right side
    28,481.62x = 862,215,013.80
  5. Step 5: Solve for x
    x = 862,215,013.80/28,481.62
  6. Step 6: Final answer
    x = 30,272.68

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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.