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Finding the Third Proportional to 12.20 and 26.31

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Solution

The third proportional to 12.20 and 26.31 is: 56.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12.20 : 26.31 = 26.31 : x
  2. Step 2: Convert to fraction form
    12.20/26.31 = 26.31/x
  3. Step 3: Cross multiply
    12.20x = 26.31 × 26.31
  4. Step 4: Simplify right side
    12.20x = 692.43
  5. Step 5: Solve for x
    x = 692.43/12.20
  6. Step 6: Final answer
    x = 56.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.