Home / 7,661.20-11,491.80-3,279.10

Finding the Fourth Proportional to 7,661.20, 11,491.80 and 3,279.10

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Solution

The fourth proportional to 7,661.20, 11,491.80 and 3,279.10 is: 4,918.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,661.20 : 11,491.80 = 3,279.10 : x
  2. Step 2: Convert to fraction form
    7,661.20/11,491.80 = 3,279.10/x
  3. Step 3: Cross multiply
    7,661.20x = 11,491.80 × 3,279.10
  4. Step 4: Simplify right side
    7,661.20x = 37,682,761.38
  5. Step 5: Solve for x
    x = 37,682,761.38/7,661.20
  6. Step 6: Final answer
    x = 4,918.65

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Similar ratio
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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.