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Finding the Fourth Proportional to 31.93, 44.08 and 21.59

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Solution

The fourth proportional to 31.93, 44.08 and 21.59 is: 29.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    31.93 : 44.08 = 21.59 : x
  2. Step 2: Convert to fraction form
    31.93/44.08 = 21.59/x
  3. Step 3: Cross multiply
    31.93x = 44.08 × 21.59
  4. Step 4: Simplify right side
    31.93x = 951.69
  5. Step 5: Solve for x
    x = 951.69/31.93
  6. Step 6: Final answer
    x = 29.81

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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.