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Finding the Fourth Proportional to 16.88, 25.38 and 15.84

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Solution

The fourth proportional to 16.88, 25.38 and 15.84 is: 23.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.88 : 25.38 = 15.84 : x
  2. Step 2: Convert to fraction form
    16.88/25.38 = 15.84/x
  3. Step 3: Cross multiply
    16.88x = 25.38 × 15.84
  4. Step 4: Simplify right side
    16.88x = 402.02
  5. Step 5: Solve for x
    x = 402.02/16.88
  6. Step 6: Final answer
    x = 23.82

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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.