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Finding the Third Proportional to 12,260 and 18,720

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Solution

The third proportional to 12,260 and 18,720 is: 28,583.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,260 : 18,720 = 18,720 : x
  2. Step 2: Convert to fraction form
    12,260/18,720 = 18,720/x
  3. Step 3: Cross multiply
    12,260x = 18,720 × 18,720
  4. Step 4: Simplify right side
    12,260x = 350,438,400
  5. Step 5: Solve for x
    x = 350,438,400/12,260
  6. Step 6: Final answer
    x = 28,583.88

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.