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Finding the Third Proportional to 15,905 and 20,181

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Solution

The third proportional to 15,905 and 20,181 is: 25,606.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,905 : 20,181 = 20,181 : x
  2. Step 2: Convert to fraction form
    15,905/20,181 = 20,181/x
  3. Step 3: Cross multiply
    15,905x = 20,181 × 20,181
  4. Step 4: Simplify right side
    15,905x = 407,272,761
  5. Step 5: Solve for x
    x = 407,272,761/15,905
  6. Step 6: Final answer
    x = 25,606.59

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Why These Related Problems?

These problems maintain the same ratio (1.27) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.