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Finding the Third Proportional to 4,876 and 7,853

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Solution

The third proportional to 4,876 and 7,853 is: 12,647.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,876 : 7,853 = 7,853 : x
  2. Step 2: Convert to fraction form
    4,876/7,853 = 7,853/x
  3. Step 3: Cross multiply
    4,876x = 7,853 × 7,853
  4. Step 4: Simplify right side
    4,876x = 61,669,609
  5. Step 5: Solve for x
    x = 61,669,609/4,876
  6. Step 6: Final answer
    x = 12,647.58

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.