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Finding the Fourth Proportional to 32.76, 45.12 and 27.90

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Solution

The fourth proportional to 32.76, 45.12 and 27.90 is: 38.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    32.76 : 45.12 = 27.90 : x
  2. Step 2: Convert to fraction form
    32.76/45.12 = 27.90/x
  3. Step 3: Cross multiply
    32.76x = 45.12 × 27.90
  4. Step 4: Simplify right side
    32.76x = 1,258.85
  5. Step 5: Solve for x
    x = 1,258.85/32.76
  6. Step 6: Final answer
    x = 38.43

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Find fourth proportional to 16.38, 22.56 and 13.95
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.