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Finding the Fourth Proportional to 22.51, 33.69 and 19.30

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Solution

The fourth proportional to 22.51, 33.69 and 19.30 is: 28.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.51 : 33.69 = 19.30 : x
  2. Step 2: Convert to fraction form
    22.51/33.69 = 19.30/x
  3. Step 3: Cross multiply
    22.51x = 33.69 × 19.30
  4. Step 4: Simplify right side
    22.51x = 650.22
  5. Step 5: Solve for x
    x = 650.22/22.51
  6. Step 6: Final answer
    x = 28.89

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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.