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Finding the Fourth Proportional to 17.39, 25.96 and 15.80

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Solution

The fourth proportional to 17.39, 25.96 and 15.80 is: 23.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.39 : 25.96 = 15.80 : x
  2. Step 2: Convert to fraction form
    17.39/25.96 = 15.80/x
  3. Step 3: Cross multiply
    17.39x = 25.96 × 15.80
  4. Step 4: Simplify right side
    17.39x = 410.00
  5. Step 5: Solve for x
    x = 410.00/17.39
  6. Step 6: Final answer
    x = 23.58

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.