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Finding the Fourth Proportional to 11.64, 17.43 and 11.31

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Solution

The fourth proportional to 11.64, 17.43 and 11.31 is: 16.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.64 : 17.43 = 11.31 : x
  2. Step 2: Convert to fraction form
    11.64/17.43 = 11.31/x
  3. Step 3: Cross multiply
    11.64x = 17.43 × 11.31
  4. Step 4: Simplify right side
    11.64x = 197.13
  5. Step 5: Solve for x
    x = 197.13/11.64
  6. Step 6: Final answer
    x = 16.94

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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.