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Finding the Fourth Proportional to 27.93, 41.90 and 18.80

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Solution

The fourth proportional to 27.93, 41.90 and 18.80 is: 28.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.93 : 41.90 = 18.80 : x
  2. Step 2: Convert to fraction form
    27.93/41.90 = 18.80/x
  3. Step 3: Cross multiply
    27.93x = 41.90 × 18.80
  4. Step 4: Simplify right side
    27.93x = 787.42
  5. Step 5: Solve for x
    x = 787.42/27.93
  6. Step 6: Final answer
    x = 28.19

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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.