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Finding the Fourth Proportional to 15.45, 23.18 and 11.44

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Solution

The fourth proportional to 15.45, 23.18 and 11.44 is: 17.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15.45 : 23.18 = 11.44 : x
  2. Step 2: Convert to fraction form
    15.45/23.18 = 11.44/x
  3. Step 3: Cross multiply
    15.45x = 23.18 × 11.44
  4. Step 4: Simplify right side
    15.45x = 265.18
  5. Step 5: Solve for x
    x = 265.18/15.45
  6. Step 6: Final answer
    x = 17.16

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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.