Home / 7,694.75-11,538.01-3,987.78

Finding the Fourth Proportional to 7,694.75, 11,538.01 and 3,987.78

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Solution

The fourth proportional to 7,694.75, 11,538.01 and 3,987.78 is: 5,979.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,694.75 : 11,538.01 = 3,987.78 : x
  2. Step 2: Convert to fraction form
    7,694.75/11,538.01 = 3,987.78/x
  3. Step 3: Cross multiply
    7,694.75x = 11,538.01 × 3,987.78
  4. Step 4: Simplify right side
    7,694.75x = 46,011,035.55
  5. Step 5: Solve for x
    x = 46,011,035.55/7,694.75
  6. Step 6: Final answer
    x = 5,979.54

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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.