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Finding the Fourth Proportional to 33.74, 46.53 and 21.28

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Solution

The fourth proportional to 33.74, 46.53 and 21.28 is: 29.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    33.74 : 46.53 = 21.28 : x
  2. Step 2: Convert to fraction form
    33.74/46.53 = 21.28/x
  3. Step 3: Cross multiply
    33.74x = 46.53 × 21.28
  4. Step 4: Simplify right side
    33.74x = 990.04
  5. Step 5: Solve for x
    x = 990.04/33.74
  6. Step 6: Final answer
    x = 29.34

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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.