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Finding the Fourth Proportional to 27.99, 42.04 and 17.18

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Solution

The fourth proportional to 27.99, 42.04 and 17.18 is: 25.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.99 : 42.04 = 17.18 : x
  2. Step 2: Convert to fraction form
    27.99/42.04 = 17.18/x
  3. Step 3: Cross multiply
    27.99x = 42.04 × 17.18
  4. Step 4: Simplify right side
    27.99x = 722.25
  5. Step 5: Solve for x
    x = 722.25/27.99
  6. Step 6: Final answer
    x = 25.81

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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.