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Finding the Third Proportional to 21.28 and 27.94

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Solution

The third proportional to 21.28 and 27.94 is: 36.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21.28 : 27.94 = 27.94 : x
  2. Step 2: Convert to fraction form
    21.28/27.94 = 27.94/x
  3. Step 3: Cross multiply
    21.28x = 27.94 × 27.94
  4. Step 4: Simplify right side
    21.28x = 780.50
  5. Step 5: Solve for x
    x = 780.50/21.28
  6. Step 6: Final answer
    x = 36.68

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.