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Finding the Fourth Proportional to 13.94, 19.21 and 9.33

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Solution

The fourth proportional to 13.94, 19.21 and 9.33 is: 12.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13.94 : 19.21 = 9.33 : x
  2. Step 2: Convert to fraction form
    13.94/19.21 = 9.33/x
  3. Step 3: Cross multiply
    13.94x = 19.21 × 9.33
  4. Step 4: Simplify right side
    13.94x = 179.13
  5. Step 5: Solve for x
    x = 179.13/13.94
  6. Step 6: Final answer
    x = 12.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.