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Finding the Third Proportional to 8,318 and 12,561

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Solution

The third proportional to 8,318 and 12,561 is: 18,968.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,318 : 12,561 = 12,561 : x
  2. Step 2: Convert to fraction form
    8,318/12,561 = 12,561/x
  3. Step 3: Cross multiply
    8,318x = 12,561 × 12,561
  4. Step 4: Simplify right side
    8,318x = 157,778,721
  5. Step 5: Solve for x
    x = 157,778,721/8,318
  6. Step 6: Final answer
    x = 18,968.35

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.