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Finding the Fourth Proportional to 29.73, 44.55 and 21.18

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Solution

The fourth proportional to 29.73, 44.55 and 21.18 is: 31.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.73 : 44.55 = 21.18 : x
  2. Step 2: Convert to fraction form
    29.73/44.55 = 21.18/x
  3. Step 3: Cross multiply
    29.73x = 44.55 × 21.18
  4. Step 4: Simplify right side
    29.73x = 943.57
  5. Step 5: Solve for x
    x = 943.57/29.73
  6. Step 6: Final answer
    x = 31.74

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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.