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Finding the Third Proportional to 6.25 and 13.75

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Solution

The third proportional to 6.25 and 13.75 is: 30.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.25 : 13.75 = 13.75 : x
  2. Step 2: Convert to fraction form
    6.25/13.75 = 13.75/x
  3. Step 3: Cross multiply
    6.25x = 13.75 × 13.75
  4. Step 4: Simplify right side
    6.25x = 189.06
  5. Step 5: Solve for x
    x = 189.06/6.25
  6. Step 6: Final answer
    x = 30.25

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.