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Finding the Third Proportional to 8,910 and 12,660

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Solution

The third proportional to 8,910 and 12,660 is: 17,988.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,910 : 12,660 = 12,660 : x
  2. Step 2: Convert to fraction form
    8,910/12,660 = 12,660/x
  3. Step 3: Cross multiply
    8,910x = 12,660 × 12,660
  4. Step 4: Simplify right side
    8,910x = 160,275,600
  5. Step 5: Solve for x
    x = 160,275,600/8,910
  6. Step 6: Final answer
    x = 17,988.28

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.