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Finding the Third Proportional to 13,180 and 15,880

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Solution

The third proportional to 13,180 and 15,880 is: 19,133.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,180 : 15,880 = 15,880 : x
  2. Step 2: Convert to fraction form
    13,180/15,880 = 15,880/x
  3. Step 3: Cross multiply
    13,180x = 15,880 × 15,880
  4. Step 4: Simplify right side
    13,180x = 252,174,400
  5. Step 5: Solve for x
    x = 252,174,400/13,180
  6. Step 6: Final answer
    x = 19,133.11

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Why These Related Problems?

These problems maintain the same ratio (1.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.