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Finding the Fourth Proportional to 32.73, 45.18 and 21.09

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Solution

The fourth proportional to 32.73, 45.18 and 21.09 is: 29.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    32.73 : 45.18 = 21.09 : x
  2. Step 2: Convert to fraction form
    32.73/45.18 = 21.09/x
  3. Step 3: Cross multiply
    32.73x = 45.18 × 21.09
  4. Step 4: Simplify right side
    32.73x = 952.85
  5. Step 5: Solve for x
    x = 952.85/32.73
  6. Step 6: Final answer
    x = 29.11

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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.