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Finding the Fourth Proportional to 9.55, 13.09 and 9.19

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Solution

The fourth proportional to 9.55, 13.09 and 9.19 is: 12.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9.55 : 13.09 = 9.19 : x
  2. Step 2: Convert to fraction form
    9.55/13.09 = 9.19/x
  3. Step 3: Cross multiply
    9.55x = 13.09 × 9.19
  4. Step 4: Simplify right side
    9.55x = 120.30
  5. Step 5: Solve for x
    x = 120.30/9.55
  6. Step 6: Final answer
    x = 12.60

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.