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Finding the Fourth Proportional to 17.29, 25.99 and 15.40

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Solution

The fourth proportional to 17.29, 25.99 and 15.40 is: 23.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.29 : 25.99 = 15.40 : x
  2. Step 2: Convert to fraction form
    17.29/25.99 = 15.40/x
  3. Step 3: Cross multiply
    17.29x = 25.99 × 15.40
  4. Step 4: Simplify right side
    17.29x = 400.25
  5. Step 5: Solve for x
    x = 400.25/17.29
  6. Step 6: Final answer
    x = 23.15

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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.