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Finding the Fourth Proportional to 16.88, 23.27 and 13.42

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Solution

The fourth proportional to 16.88, 23.27 and 13.42 is: 18.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.88 : 23.27 = 13.42 : x
  2. Step 2: Convert to fraction form
    16.88/23.27 = 13.42/x
  3. Step 3: Cross multiply
    16.88x = 23.27 × 13.42
  4. Step 4: Simplify right side
    16.88x = 312.10
  5. Step 5: Solve for x
    x = 312.10/16.88
  6. Step 6: Final answer
    x = 18.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.