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Finding the Fourth Proportional to 29.79, 44.57 and 21.76

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Solution

The fourth proportional to 29.79, 44.57 and 21.76 is: 32.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.79 : 44.57 = 21.76 : x
  2. Step 2: Convert to fraction form
    29.79/44.57 = 21.76/x
  3. Step 3: Cross multiply
    29.79x = 44.57 × 21.76
  4. Step 4: Simplify right side
    29.79x = 969.84
  5. Step 5: Solve for x
    x = 969.84/29.79
  6. Step 6: Final answer
    x = 32.56

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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.