Home / 7,917.34-11,872.52-4,218.78

Finding the Fourth Proportional to 7,917.34, 11,872.52 and 4,218.78

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Solution

The fourth proportional to 7,917.34, 11,872.52 and 4,218.78 is: 6,326.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,917.34 : 11,872.52 = 4,218.78 : x
  2. Step 2: Convert to fraction form
    7,917.34/11,872.52 = 4,218.78/x
  3. Step 3: Cross multiply
    7,917.34x = 11,872.52 × 4,218.78
  4. Step 4: Simplify right side
    7,917.34x = 50,087,544.65
  5. Step 5: Solve for x
    x = 50,087,544.65/7,917.34
  6. Step 6: Final answer
    x = 6,326.31

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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.