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Finding the Fourth Proportional to 10.28, 14.15 and 10.03

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Solution

The fourth proportional to 10.28, 14.15 and 10.03 is: 13.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.28 : 14.15 = 10.03 : x
  2. Step 2: Convert to fraction form
    10.28/14.15 = 10.03/x
  3. Step 3: Cross multiply
    10.28x = 14.15 × 10.03
  4. Step 4: Simplify right side
    10.28x = 141.80
  5. Step 5: Solve for x
    x = 141.80/10.28
  6. Step 6: Final answer
    x = 13.79

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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.