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Finding the Fourth Proportional to 22.09, 33.31 and 21.02

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Solution

The fourth proportional to 22.09, 33.31 and 21.02 is: 31.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.09 : 33.31 = 21.02 : x
  2. Step 2: Convert to fraction form
    22.09/33.31 = 21.02/x
  3. Step 3: Cross multiply
    22.09x = 33.31 × 21.02
  4. Step 4: Simplify right side
    22.09x = 700.18
  5. Step 5: Solve for x
    x = 700.18/22.09
  6. Step 6: Final answer
    x = 31.70

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.