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Finding the Fourth Proportional to 6,660.72, 9,992.16 and 2,765.28

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Solution

The fourth proportional to 6,660.72, 9,992.16 and 2,765.28 is: 4,148.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,660.72 : 9,992.16 = 2,765.28 : x
  2. Step 2: Convert to fraction form
    6,660.72/9,992.16 = 2,765.28/x
  3. Step 3: Cross multiply
    6,660.72x = 9,992.16 × 2,765.28
  4. Step 4: Simplify right side
    6,660.72x = 27,631,120.20
  5. Step 5: Solve for x
    x = 27,631,120.20/6,660.72
  6. Step 6: Final answer
    x = 4,148.37

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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.