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Finding the Fourth Proportional to 12,480.41, 18,715.41 and 5,079.85

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Solution

The fourth proportional to 12,480.41, 18,715.41 and 5,079.85 is: 7,617.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480.41 : 18,715.41 = 5,079.85 : x
  2. Step 2: Convert to fraction form
    12,480.41/18,715.41 = 5,079.85/x
  3. Step 3: Cross multiply
    12,480.41x = 18,715.41 × 5,079.85
  4. Step 4: Simplify right side
    12,480.41x = 95,071,428.70
  5. Step 5: Solve for x
    x = 95,071,428.70/12,480.41
  6. Step 6: Final answer
    x = 7,617.65

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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.