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Finding the Third Proportional to 10,916 and 16,638

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Solution

The third proportional to 10,916 and 16,638 is: 25,359.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,916 : 16,638 = 16,638 : x
  2. Step 2: Convert to fraction form
    10,916/16,638 = 16,638/x
  3. Step 3: Cross multiply
    10,916x = 16,638 × 16,638
  4. Step 4: Simplify right side
    10,916x = 276,823,044
  5. Step 5: Solve for x
    x = 276,823,044/10,916
  6. Step 6: Final answer
    x = 25,359.38

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.