Home / 20,616.85-30,904.50-8,132.05

Finding the Fourth Proportional to 20,616.85, 30,904.50 and 8,132.05

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Solution

The fourth proportional to 20,616.85, 30,904.50 and 8,132.05 is: 12,189.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,616.85 : 30,904.50 = 8,132.05 : x
  2. Step 2: Convert to fraction form
    20,616.85/30,904.50 = 8,132.05/x
  3. Step 3: Cross multiply
    20,616.85x = 30,904.50 × 8,132.05
  4. Step 4: Simplify right side
    20,616.85x = 251,317,008.35
  5. Step 5: Solve for x
    x = 251,317,008.35/20,616.85
  6. Step 6: Final answer
    x = 12,189.88

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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.