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Finding the Third Proportional to 21.50 and 41

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Solution

The third proportional to 21.50 and 41 is: 78.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21.50 : 41 = 41 : x
  2. Step 2: Convert to fraction form
    21.50/41 = 41/x
  3. Step 3: Cross multiply
    21.50x = 41 × 41
  4. Step 4: Simplify right side
    21.50x = 1,681
  5. Step 5: Solve for x
    x = 1,681/21.50
  6. Step 6: Final answer
    x = 78.19

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Why These Related Problems?

These problems maintain the same ratio (1.91) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.