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Finding the Fourth Proportional to 11.70, 15.94 and 11.64

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Solution

The fourth proportional to 11.70, 15.94 and 11.64 is: 15.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.70 : 15.94 = 11.64 : x
  2. Step 2: Convert to fraction form
    11.70/15.94 = 11.64/x
  3. Step 3: Cross multiply
    11.70x = 15.94 × 11.64
  4. Step 4: Simplify right side
    11.70x = 185.54
  5. Step 5: Solve for x
    x = 185.54/11.70
  6. Step 6: Final answer
    x = 15.86

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.