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Finding the Fourth Proportional to 12.05, 18 and 9.38

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Solution

The fourth proportional to 12.05, 18 and 9.38 is: 14.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12.05 : 18 = 9.38 : x
  2. Step 2: Convert to fraction form
    12.05/18 = 9.38/x
  3. Step 3: Cross multiply
    12.05x = 18 × 9.38
  4. Step 4: Simplify right side
    12.05x = 168.84
  5. Step 5: Solve for x
    x = 168.84/12.05
  6. Step 6: Final answer
    x = 14.01

Related Problems

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.