Home / 7,680.26-11,520.31-3,519.09

Finding the Fourth Proportional to 7,680.26, 11,520.31 and 3,519.09

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Solution

The fourth proportional to 7,680.26, 11,520.31 and 3,519.09 is: 5,278.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,680.26 : 11,520.31 = 3,519.09 : x
  2. Step 2: Convert to fraction form
    7,680.26/11,520.31 = 3,519.09/x
  3. Step 3: Cross multiply
    7,680.26x = 11,520.31 × 3,519.09
  4. Step 4: Simplify right side
    7,680.26x = 40,540,932.52
  5. Step 5: Solve for x
    x = 40,540,932.52/7,680.26
  6. Step 6: Final answer
    x = 5,278.59

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1.5x scale

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.