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Finding the Fourth Proportional to 17,616.78, 26,436.60 and 7,631.28

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Solution

The fourth proportional to 17,616.78, 26,436.60 and 7,631.28 is: 11,451.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,616.78 : 26,436.60 = 7,631.28 : x
  2. Step 2: Convert to fraction form
    17,616.78/26,436.60 = 7,631.28/x
  3. Step 3: Cross multiply
    17,616.78x = 26,436.60 × 7,631.28
  4. Step 4: Simplify right side
    17,616.78x = 201,745,096.85
  5. Step 5: Solve for x
    x = 201,745,096.85/17,616.78
  6. Step 6: Final answer
    x = 11,451.87

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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.