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Finding the Fourth Proportional to 9.61, 13.17 and 9.52

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Solution

The fourth proportional to 9.61, 13.17 and 9.52 is: 13.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    9.61 : 13.17 = 9.52 : x
  2. Step 2: Convert to fraction form
    9.61/13.17 = 9.52/x
  3. Step 3: Cross multiply
    9.61x = 13.17 × 9.52
  4. Step 4: Simplify right side
    9.61x = 125.38
  5. Step 5: Solve for x
    x = 125.38/9.61
  6. Step 6: Final answer
    x = 13.05

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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.