Home / 12,081.28-18,121.68-6,876

Finding the Fourth Proportional to 12,081.28, 18,121.68 and 6,876

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Solution

The fourth proportional to 12,081.28, 18,121.68 and 6,876 is: 10,313.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,081.28 : 18,121.68 = 6,876 : x
  2. Step 2: Convert to fraction form
    12,081.28/18,121.68 = 6,876/x
  3. Step 3: Cross multiply
    12,081.28x = 18,121.68 × 6,876
  4. Step 4: Simplify right side
    12,081.28x = 124,604,671.68
  5. Step 5: Solve for x
    x = 124,604,671.68/12,081.28
  6. Step 6: Final answer
    x = 10,313.86

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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.