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Finding the Fourth Proportional to 11.59, 15.87 and 11.29

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Solution

The fourth proportional to 11.59, 15.87 and 11.29 is: 15.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.59 : 15.87 = 11.29 : x
  2. Step 2: Convert to fraction form
    11.59/15.87 = 11.29/x
  3. Step 3: Cross multiply
    11.59x = 15.87 × 11.29
  4. Step 4: Simplify right side
    11.59x = 179.17
  5. Step 5: Solve for x
    x = 179.17/11.59
  6. Step 6: Final answer
    x = 15.46

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.