Home / 7,815.12-11,727.48-3,198

Finding the Fourth Proportional to 7,815.12, 11,727.48 and 3,198

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Solution

The fourth proportional to 7,815.12, 11,727.48 and 3,198 is: 4,798.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.12 : 11,727.48 = 3,198 : x
  2. Step 2: Convert to fraction form
    7,815.12/11,727.48 = 3,198/x
  3. Step 3: Cross multiply
    7,815.12x = 11,727.48 × 3,198
  4. Step 4: Simplify right side
    7,815.12x = 37,504,481.04
  5. Step 5: Solve for x
    x = 37,504,481.04/7,815.12
  6. Step 6: Final answer
    x = 4,798.96

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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.