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Finding the Third Proportional to 18.15 and 27.76

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Solution

The third proportional to 18.15 and 27.76 is: 42.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.15 : 27.76 = 27.76 : x
  2. Step 2: Convert to fraction form
    18.15/27.76 = 27.76/x
  3. Step 3: Cross multiply
    18.15x = 27.76 × 27.76
  4. Step 4: Simplify right side
    18.15x = 770.88
  5. Step 5: Solve for x
    x = 770.88/18.15
  6. Step 6: Final answer
    x = 42.46

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.