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Finding the Fourth Proportional to 27.74, 41.58 and 13.28

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Solution

The fourth proportional to 27.74, 41.58 and 13.28 is: 19.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.74 : 41.58 = 13.28 : x
  2. Step 2: Convert to fraction form
    27.74/41.58 = 13.28/x
  3. Step 3: Cross multiply
    27.74x = 41.58 × 13.28
  4. Step 4: Simplify right side
    27.74x = 551.96
  5. Step 5: Solve for x
    x = 551.96/27.74
  6. Step 6: Final answer
    x = 19.90

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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.