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Finding the Fourth Proportional to 19.88, 27.31 and 16.41

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Solution

The fourth proportional to 19.88, 27.31 and 16.41 is: 22.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.88 : 27.31 = 16.41 : x
  2. Step 2: Convert to fraction form
    19.88/27.31 = 16.41/x
  3. Step 3: Cross multiply
    19.88x = 27.31 × 16.41
  4. Step 4: Simplify right side
    19.88x = 448.16
  5. Step 5: Solve for x
    x = 448.16/19.88
  6. Step 6: Final answer
    x = 22.54

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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.