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Finding the Third Proportional to 6.25 and 12.85

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Solution

The third proportional to 6.25 and 12.85 is: 26.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.25 : 12.85 = 12.85 : x
  2. Step 2: Convert to fraction form
    6.25/12.85 = 12.85/x
  3. Step 3: Cross multiply
    6.25x = 12.85 × 12.85
  4. Step 4: Simplify right side
    6.25x = 165.00
  5. Step 5: Solve for x
    x = 165.00/6.25
  6. Step 6: Final answer
    x = 26.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.