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Finding the Third Proportional to 5,105 and 7,658

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Solution

The third proportional to 5,105 and 7,658 is: 11,487.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,105 : 7,658 = 7,658 : x
  2. Step 2: Convert to fraction form
    5,105/7,658 = 7,658/x
  3. Step 3: Cross multiply
    5,105x = 7,658 × 7,658
  4. Step 4: Simplify right side
    5,105x = 58,644,964
  5. Step 5: Solve for x
    x = 58,644,964/5,105
  6. Step 6: Final answer
    x = 11,487.75

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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.