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Finding the Fourth Proportional to 25.31, 34.88 and 19.83

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Solution

The fourth proportional to 25.31, 34.88 and 19.83 is: 27.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.31 : 34.88 = 19.83 : x
  2. Step 2: Convert to fraction form
    25.31/34.88 = 19.83/x
  3. Step 3: Cross multiply
    25.31x = 34.88 × 19.83
  4. Step 4: Simplify right side
    25.31x = 691.57
  5. Step 5: Solve for x
    x = 691.57/25.31
  6. Step 6: Final answer
    x = 27.33

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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.