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Finding the Fourth Proportional to 13.28, 19.96 and 10.08

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Solution

The fourth proportional to 13.28, 19.96 and 10.08 is: 15.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13.28 : 19.96 = 10.08 : x
  2. Step 2: Convert to fraction form
    13.28/19.96 = 10.08/x
  3. Step 3: Cross multiply
    13.28x = 19.96 × 10.08
  4. Step 4: Simplify right side
    13.28x = 201.20
  5. Step 5: Solve for x
    x = 201.20/13.28
  6. Step 6: Final answer
    x = 15.15

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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.