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Finding the Third Proportional to 4,879 and 11,515

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Solution

The third proportional to 4,879 and 11,515 is: 27,176.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,879 : 11,515 = 11,515 : x
  2. Step 2: Convert to fraction form
    4,879/11,515 = 11,515/x
  3. Step 3: Cross multiply
    4,879x = 11,515 × 11,515
  4. Step 4: Simplify right side
    4,879x = 132,595,225
  5. Step 5: Solve for x
    x = 132,595,225/4,879
  6. Step 6: Final answer
    x = 27,176.72

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Why These Related Problems?

These problems maintain the same ratio (2.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.