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Finding the Third Proportional to 13.88 and 20.19

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Solution

The third proportional to 13.88 and 20.19 is: 29.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13.88 : 20.19 = 20.19 : x
  2. Step 2: Convert to fraction form
    13.88/20.19 = 20.19/x
  3. Step 3: Cross multiply
    13.88x = 20.19 × 20.19
  4. Step 4: Simplify right side
    13.88x = 407.54
  5. Step 5: Solve for x
    x = 407.54/13.88
  6. Step 6: Final answer
    x = 29.37

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.