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Finding the Fourth Proportional to 17.42, 26.12 and 11.70

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Solution

The fourth proportional to 17.42, 26.12 and 11.70 is: 17.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.42 : 26.12 = 11.70 : x
  2. Step 2: Convert to fraction form
    17.42/26.12 = 11.70/x
  3. Step 3: Cross multiply
    17.42x = 26.12 × 11.70
  4. Step 4: Simplify right side
    17.42x = 305.60
  5. Step 5: Solve for x
    x = 305.60/17.42
  6. Step 6: Final answer
    x = 17.54

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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.