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Finding the Fourth Proportional to 26.97, 40.43 and 12.53

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Solution

The fourth proportional to 26.97, 40.43 and 12.53 is: 18.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.97 : 40.43 = 12.53 : x
  2. Step 2: Convert to fraction form
    26.97/40.43 = 12.53/x
  3. Step 3: Cross multiply
    26.97x = 40.43 × 12.53
  4. Step 4: Simplify right side
    26.97x = 506.53
  5. Step 5: Solve for x
    x = 506.53/26.97
  6. Step 6: Final answer
    x = 18.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.