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Finding the Third Proportional to 13,908 and 15,860

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Solution

The third proportional to 13,908 and 15,860 is: 18,085.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,908 : 15,860 = 15,860 : x
  2. Step 2: Convert to fraction form
    13,908/15,860 = 15,860/x
  3. Step 3: Cross multiply
    13,908x = 15,860 × 15,860
  4. Step 4: Simplify right side
    13,908x = 251,539,600
  5. Step 5: Solve for x
    x = 251,539,600/13,908
  6. Step 6: Final answer
    x = 18,085.96

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Why These Related Problems?

These problems maintain the same ratio (1.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.