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Finding the Fourth Proportional to 17.15, 25.74 and 11.84

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Solution

The fourth proportional to 17.15, 25.74 and 11.84 is: 17.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.15 : 25.74 = 11.84 : x
  2. Step 2: Convert to fraction form
    17.15/25.74 = 11.84/x
  3. Step 3: Cross multiply
    17.15x = 25.74 × 11.84
  4. Step 4: Simplify right side
    17.15x = 304.63
  5. Step 5: Solve for x
    x = 304.63/17.15
  6. Step 6: Final answer
    x = 17.77

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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.