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Finding the Fourth Proportional to 22.19, 33.23 and 18.98

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Solution

The fourth proportional to 22.19, 33.23 and 18.98 is: 28.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.19 : 33.23 = 18.98 : x
  2. Step 2: Convert to fraction form
    22.19/33.23 = 18.98/x
  3. Step 3: Cross multiply
    22.19x = 33.23 × 18.98
  4. Step 4: Simplify right side
    22.19x = 630.59
  5. Step 5: Solve for x
    x = 630.59/22.19
  6. Step 6: Final answer
    x = 28.42

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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.