Home / 7,279.70-10,919.55-3,999.20

Finding the Fourth Proportional to 7,279.70, 10,919.55 and 3,999.20

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Solution

The fourth proportional to 7,279.70, 10,919.55 and 3,999.20 is: 5,998.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,279.70 : 10,919.55 = 3,999.20 : x
  2. Step 2: Convert to fraction form
    7,279.70/10,919.55 = 3,999.20/x
  3. Step 3: Cross multiply
    7,279.70x = 10,919.55 × 3,999.20
  4. Step 4: Simplify right side
    7,279.70x = 43,669,464.36
  5. Step 5: Solve for x
    x = 43,669,464.36/7,279.70
  6. Step 6: Final answer
    x = 5,998.80

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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.