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Finding the Fourth Proportional to 17.44, 26.19 and 12.91

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Solution

The fourth proportional to 17.44, 26.19 and 12.91 is: 19.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.44 : 26.19 = 12.91 : x
  2. Step 2: Convert to fraction form
    17.44/26.19 = 12.91/x
  3. Step 3: Cross multiply
    17.44x = 26.19 × 12.91
  4. Step 4: Simplify right side
    17.44x = 338.11
  5. Step 5: Solve for x
    x = 338.11/17.44
  6. Step 6: Final answer
    x = 19.39

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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.