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Finding the Fourth Proportional to 10.38, 15.56 and 5.03

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Solution

The fourth proportional to 10.38, 15.56 and 5.03 is: 7.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.38 : 15.56 = 5.03 : x
  2. Step 2: Convert to fraction form
    10.38/15.56 = 5.03/x
  3. Step 3: Cross multiply
    10.38x = 15.56 × 5.03
  4. Step 4: Simplify right side
    10.38x = 78.27
  5. Step 5: Solve for x
    x = 78.27/10.38
  6. Step 6: Final answer
    x = 7.54

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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.