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Finding the Third Proportional to 21.41 and 30

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Solution

The third proportional to 21.41 and 30 is: 42.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21.41 : 30 = 30 : x
  2. Step 2: Convert to fraction form
    21.41/30 = 30/x
  3. Step 3: Cross multiply
    21.41x = 30 × 30
  4. Step 4: Simplify right side
    21.41x = 900
  5. Step 5: Solve for x
    x = 900/21.41
  6. Step 6: Final answer
    x = 42.04

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.