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Finding the Fourth Proportional to 24.24, 33.44 and 21

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Solution

The fourth proportional to 24.24, 33.44 and 21 is: 28.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    24.24 : 33.44 = 21 : x
  2. Step 2: Convert to fraction form
    24.24/33.44 = 21/x
  3. Step 3: Cross multiply
    24.24x = 33.44 × 21
  4. Step 4: Simplify right side
    24.24x = 702.24
  5. Step 5: Solve for x
    x = 702.24/24.24
  6. Step 6: Final answer
    x = 28.97

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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.