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Finding the Fourth Proportional to 27.58, 38.23 and 27.15

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Solution

The fourth proportional to 27.58, 38.23 and 27.15 is: 37.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.58 : 38.23 = 27.15 : x
  2. Step 2: Convert to fraction form
    27.58/38.23 = 27.15/x
  3. Step 3: Cross multiply
    27.58x = 38.23 × 27.15
  4. Step 4: Simplify right side
    27.58x = 1,037.94
  5. Step 5: Solve for x
    x = 1,037.94/27.58
  6. Step 6: Final answer
    x = 37.63

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.