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Finding the Third Proportional to 13,189 and 20,175

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Solution

The third proportional to 13,189 and 20,175 is: 30,861.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,189 : 20,175 = 20,175 : x
  2. Step 2: Convert to fraction form
    13,189/20,175 = 20,175/x
  3. Step 3: Cross multiply
    13,189x = 20,175 × 20,175
  4. Step 4: Simplify right side
    13,189x = 407,030,625
  5. Step 5: Solve for x
    x = 407,030,625/13,189
  6. Step 6: Final answer
    x = 30,861.37

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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.