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Finding the Fourth Proportional to 13, 19.46 and 9.38

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Solution

The fourth proportional to 13, 19.46 and 9.38 is: 14.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13 : 19.46 = 9.38 : x
  2. Step 2: Convert to fraction form
    13/19.46 = 9.38/x
  3. Step 3: Cross multiply
    13x = 19.46 × 9.38
  4. Step 4: Simplify right side
    13x = 182.53
  5. Step 5: Solve for x
    x = 182.53/13
  6. Step 6: Final answer
    x = 14.04

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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.