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Finding the Third Proportional to 4,876 and 7,115

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Solution

The third proportional to 4,876 and 7,115 is: 10,382.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,876 : 7,115 = 7,115 : x
  2. Step 2: Convert to fraction form
    4,876/7,115 = 7,115/x
  3. Step 3: Cross multiply
    4,876x = 7,115 × 7,115
  4. Step 4: Simplify right side
    4,876x = 50,623,225
  5. Step 5: Solve for x
    x = 50,623,225/4,876
  6. Step 6: Final answer
    x = 10,382.12

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.