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Finding the Third Proportional to 13,500 and 15,980

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Solution

The third proportional to 13,500 and 15,980 is: 18,915.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,500 : 15,980 = 15,980 : x
  2. Step 2: Convert to fraction form
    13,500/15,980 = 15,980/x
  3. Step 3: Cross multiply
    13,500x = 15,980 × 15,980
  4. Step 4: Simplify right side
    13,500x = 255,360,400
  5. Step 5: Solve for x
    x = 255,360,400/13,500
  6. Step 6: Final answer
    x = 18,915.59

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.