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Finding the Fourth Proportional to 7,027.80, 9,699 and 3,885

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Solution

The fourth proportional to 7,027.80, 9,699 and 3,885 is: 5,361.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,027.80 : 9,699 = 3,885 : x
  2. Step 2: Convert to fraction form
    7,027.80/9,699 = 3,885/x
  3. Step 3: Cross multiply
    7,027.80x = 9,699 × 3,885
  4. Step 4: Simplify right side
    7,027.80x = 37,680,615
  5. Step 5: Solve for x
    x = 37,680,615/7,027.80
  6. Step 6: Final answer
    x = 5,361.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.