Home / 7,900.38-11,842.25-3,218.58

Finding the Fourth Proportional to 7,900.38, 11,842.25 and 3,218.58

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Solution

The fourth proportional to 7,900.38, 11,842.25 and 3,218.58 is: 4,824.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,900.38 : 11,842.25 = 3,218.58 : x
  2. Step 2: Convert to fraction form
    7,900.38/11,842.25 = 3,218.58/x
  3. Step 3: Cross multiply
    7,900.38x = 11,842.25 × 3,218.58
  4. Step 4: Simplify right side
    7,900.38x = 38,115,212.91
  5. Step 5: Solve for x
    x = 38,115,212.91/7,900.38
  6. Step 6: Final answer
    x = 4,824.48

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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.