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Finding the Fourth Proportional to 11.80, 17.84 and 11.56

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Solution

The fourth proportional to 11.80, 17.84 and 11.56 is: 17.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.80 : 17.84 = 11.56 : x
  2. Step 2: Convert to fraction form
    11.80/17.84 = 11.56/x
  3. Step 3: Cross multiply
    11.80x = 17.84 × 11.56
  4. Step 4: Simplify right side
    11.80x = 206.23
  5. Step 5: Solve for x
    x = 206.23/11.80
  6. Step 6: Final answer
    x = 17.48

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.