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Finding the Fourth Proportional to 27.61, 41.40 and 18.59

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Solution

The fourth proportional to 27.61, 41.40 and 18.59 is: 27.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.61 : 41.40 = 18.59 : x
  2. Step 2: Convert to fraction form
    27.61/41.40 = 18.59/x
  3. Step 3: Cross multiply
    27.61x = 41.40 × 18.59
  4. Step 4: Simplify right side
    27.61x = 769.73
  5. Step 5: Solve for x
    x = 769.73/27.61
  6. Step 6: Final answer
    x = 27.88

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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.