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Finding the Fourth Proportional to 25.28, 34.87 and 17.09

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Solution

The fourth proportional to 25.28, 34.87 and 17.09 is: 23.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.28 : 34.87 = 17.09 : x
  2. Step 2: Convert to fraction form
    25.28/34.87 = 17.09/x
  3. Step 3: Cross multiply
    25.28x = 34.87 × 17.09
  4. Step 4: Simplify right side
    25.28x = 595.93
  5. Step 5: Solve for x
    x = 595.93/25.28
  6. Step 6: Final answer
    x = 23.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.