Home / 7,821.62-11,732.43-3,207.86

Finding the Fourth Proportional to 7,821.62, 11,732.43 and 3,207.86

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Solution

The fourth proportional to 7,821.62, 11,732.43 and 3,207.86 is: 4,811.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,821.62 : 11,732.43 = 3,207.86 : x
  2. Step 2: Convert to fraction form
    7,821.62/11,732.43 = 3,207.86/x
  3. Step 3: Cross multiply
    7,821.62x = 11,732.43 × 3,207.86
  4. Step 4: Simplify right side
    7,821.62x = 37,635,934.24
  5. Step 5: Solve for x
    x = 37,635,934.24/7,821.62
  6. Step 6: Final answer
    x = 4,811.79

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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.