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Finding the Third Proportional to 13.92 and 34.80

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Solution

The third proportional to 13.92 and 34.80 is: 87.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13.92 : 34.80 = 34.80 : x
  2. Step 2: Convert to fraction form
    13.92/34.80 = 34.80/x
  3. Step 3: Cross multiply
    13.92x = 34.80 × 34.80
  4. Step 4: Simplify right side
    13.92x = 1,211.37
  5. Step 5: Solve for x
    x = 1,211.37/13.92
  6. Step 6: Final answer
    x = 87.01

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Why These Related Problems?

These problems maintain the same ratio (2.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.