Home / 20,517.83-30,780.03-8,671.72

Finding the Fourth Proportional to 20,517.83, 30,780.03 and 8,671.72

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Solution

The fourth proportional to 20,517.83, 30,780.03 and 8,671.72 is: 13,008.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.83 : 30,780.03 = 8,671.72 : x
  2. Step 2: Convert to fraction form
    20,517.83/30,780.03 = 8,671.72/x
  3. Step 3: Cross multiply
    20,517.83x = 30,780.03 × 8,671.72
  4. Step 4: Simplify right side
    20,517.83x = 266,915,757.32
  5. Step 5: Solve for x
    x = 266,915,757.32/20,517.83
  6. Step 6: Final answer
    x = 13,008.97

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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.