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Finding the Third Proportional to 12,480 and 18,771

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Solution

The third proportional to 12,480 and 18,771 is: 28,233.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480 : 18,771 = 18,771 : x
  2. Step 2: Convert to fraction form
    12,480/18,771 = 18,771/x
  3. Step 3: Cross multiply
    12,480x = 18,771 × 18,771
  4. Step 4: Simplify right side
    12,480x = 352,350,441
  5. Step 5: Solve for x
    x = 352,350,441/12,480
  6. Step 6: Final answer
    x = 28,233.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.