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Finding the Fourth Proportional to 7,620.03, 11,427 and 5,155.56

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Solution

The fourth proportional to 7,620.03, 11,427 and 5,155.56 is: 7,731.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,620.03 : 11,427 = 5,155.56 : x
  2. Step 2: Convert to fraction form
    7,620.03/11,427 = 5,155.56/x
  3. Step 3: Cross multiply
    7,620.03x = 11,427 × 5,155.56
  4. Step 4: Simplify right side
    7,620.03x = 58,912,584.12
  5. Step 5: Solve for x
    x = 58,912,584.12/7,620.03
  6. Step 6: Final answer
    x = 7,731.28

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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.