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Finding the Third Proportional to 8,691 and 18,951

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Solution

The third proportional to 8,691 and 18,951 is: 41,323.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691 : 18,951 = 18,951 : x
  2. Step 2: Convert to fraction form
    8,691/18,951 = 18,951/x
  3. Step 3: Cross multiply
    8,691x = 18,951 × 18,951
  4. Step 4: Simplify right side
    8,691x = 359,140,401
  5. Step 5: Solve for x
    x = 359,140,401/8,691
  6. Step 6: Final answer
    x = 41,323.25

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.