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Finding the Fourth Proportional to 19.17, 28.85 and 16.69

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Solution

The fourth proportional to 19.17, 28.85 and 16.69 is: 25.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.17 : 28.85 = 16.69 : x
  2. Step 2: Convert to fraction form
    19.17/28.85 = 16.69/x
  3. Step 3: Cross multiply
    19.17x = 28.85 × 16.69
  4. Step 4: Simplify right side
    19.17x = 481.51
  5. Step 5: Solve for x
    x = 481.51/19.17
  6. Step 6: Final answer
    x = 25.12

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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.