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Finding the Fourth Proportional to 5,115.56, 7,674.72 and 2,775

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Solution

The fourth proportional to 5,115.56, 7,674.72 and 2,775 is: 4,163.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.56 : 7,674.72 = 2,775 : x
  2. Step 2: Convert to fraction form
    5,115.56/7,674.72 = 2,775/x
  3. Step 3: Cross multiply
    5,115.56x = 7,674.72 × 2,775
  4. Step 4: Simplify right side
    5,115.56x = 21,297,348
  5. Step 5: Solve for x
    x = 21,297,348/5,115.56
  6. Step 6: Final answer
    x = 4,163.25

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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.