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Finding the Fourth Proportional to 29.29, 43.86 and 21.61

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Solution

The fourth proportional to 29.29, 43.86 and 21.61 is: 32.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.29 : 43.86 = 21.61 : x
  2. Step 2: Convert to fraction form
    29.29/43.86 = 21.61/x
  3. Step 3: Cross multiply
    29.29x = 43.86 × 21.61
  4. Step 4: Simplify right side
    29.29x = 947.81
  5. Step 5: Solve for x
    x = 947.81/29.29
  6. Step 6: Final answer
    x = 32.36

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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.