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Finding the Third Proportional to 13,129 and 20,180

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Solution

The third proportional to 13,129 and 20,180 is: 31,017.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129 : 20,180 = 20,180 : x
  2. Step 2: Convert to fraction form
    13,129/20,180 = 20,180/x
  3. Step 3: Cross multiply
    13,129x = 20,180 × 20,180
  4. Step 4: Simplify right side
    13,129x = 407,232,400
  5. Step 5: Solve for x
    x = 407,232,400/13,129
  6. Step 6: Final answer
    x = 31,017.78

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.