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Finding the Fourth Proportional to 17.43, 26.15 and 13.89

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Solution

The fourth proportional to 17.43, 26.15 and 13.89 is: 20.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.43 : 26.15 = 13.89 : x
  2. Step 2: Convert to fraction form
    17.43/26.15 = 13.89/x
  3. Step 3: Cross multiply
    17.43x = 26.15 × 13.89
  4. Step 4: Simplify right side
    17.43x = 363.15
  5. Step 5: Solve for x
    x = 363.15/17.43
  6. Step 6: Final answer
    x = 20.84

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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.