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Finding the Fourth Proportional to 26.91, 40.28 and 17.74

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Solution

The fourth proportional to 26.91, 40.28 and 17.74 is: 26.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.91 : 40.28 = 17.74 : x
  2. Step 2: Convert to fraction form
    26.91/40.28 = 17.74/x
  3. Step 3: Cross multiply
    26.91x = 40.28 × 17.74
  4. Step 4: Simplify right side
    26.91x = 714.53
  5. Step 5: Solve for x
    x = 714.53/26.91
  6. Step 6: Final answer
    x = 26.55

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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.