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Finding the Third Proportional to 12,272 and 18,128

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Solution

The third proportional to 12,272 and 18,128 is: 26,778.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,272 : 18,128 = 18,128 : x
  2. Step 2: Convert to fraction form
    12,272/18,128 = 18,128/x
  3. Step 3: Cross multiply
    12,272x = 18,128 × 18,128
  4. Step 4: Simplify right side
    12,272x = 328,624,384
  5. Step 5: Solve for x
    x = 328,624,384/12,272
  6. Step 6: Final answer
    x = 26,778.39

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.