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Finding the Fourth Proportional to 26.78, 40.07 and 17.73

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Solution

The fourth proportional to 26.78, 40.07 and 17.73 is: 26.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.78 : 40.07 = 17.73 : x
  2. Step 2: Convert to fraction form
    26.78/40.07 = 17.73/x
  3. Step 3: Cross multiply
    26.78x = 40.07 × 17.73
  4. Step 4: Simplify right side
    26.78x = 710.35
  5. Step 5: Solve for x
    x = 710.35/26.78
  6. Step 6: Final answer
    x = 26.53

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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.