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Finding the Fourth Proportional to 5,199.75, 7,799.63 and 2,081.15

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Solution

The fourth proportional to 5,199.75, 7,799.63 and 2,081.15 is: 3,121.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,199.75 : 7,799.63 = 2,081.15 : x
  2. Step 2: Convert to fraction form
    5,199.75/7,799.63 = 2,081.15/x
  3. Step 3: Cross multiply
    5,199.75x = 7,799.63 × 2,081.15
  4. Step 4: Simplify right side
    5,199.75x = 16,232,150.57
  5. Step 5: Solve for x
    x = 16,232,150.57/5,199.75
  6. Step 6: Final answer
    x = 3,121.72

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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.