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Finding the Fourth Proportional to 22.51, 33.80 and 18.87

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Solution

The fourth proportional to 22.51, 33.80 and 18.87 is: 28.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.51 : 33.80 = 18.87 : x
  2. Step 2: Convert to fraction form
    22.51/33.80 = 18.87/x
  3. Step 3: Cross multiply
    22.51x = 33.80 × 18.87
  4. Step 4: Simplify right side
    22.51x = 637.69
  5. Step 5: Solve for x
    x = 637.69/22.51
  6. Step 6: Final answer
    x = 28.33

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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.