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Finding the Fourth Proportional to 27.56, 41.36 and 13.12

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Solution

The fourth proportional to 27.56, 41.36 and 13.12 is: 19.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.56 : 41.36 = 13.12 : x
  2. Step 2: Convert to fraction form
    27.56/41.36 = 13.12/x
  3. Step 3: Cross multiply
    27.56x = 41.36 × 13.12
  4. Step 4: Simplify right side
    27.56x = 542.47
  5. Step 5: Solve for x
    x = 542.47/27.56
  6. Step 6: Final answer
    x = 19.68

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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.