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Finding the Third Proportional to 13,720 and 18,700

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Solution

The third proportional to 13,720 and 18,700 is: 25,487.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720 : 18,700 = 18,700 : x
  2. Step 2: Convert to fraction form
    13,720/18,700 = 18,700/x
  3. Step 3: Cross multiply
    13,720x = 18,700 × 18,700
  4. Step 4: Simplify right side
    13,720x = 349,690,000
  5. Step 5: Solve for x
    x = 349,690,000/13,720
  6. Step 6: Final answer
    x = 25,487.61

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.