Home / 3,879.21-5,816.62-2,648.12

Finding the Fourth Proportional to 3,879.21, 5,816.62 and 2,648.12

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Solution

The fourth proportional to 3,879.21, 5,816.62 and 2,648.12 is: 3,970.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.21 : 5,816.62 = 2,648.12 : x
  2. Step 2: Convert to fraction form
    3,879.21/5,816.62 = 2,648.12/x
  3. Step 3: Cross multiply
    3,879.21x = 5,816.62 × 2,648.12
  4. Step 4: Simplify right side
    3,879.21x = 15,403,072.05
  5. Step 5: Solve for x
    x = 15,403,072.05/3,879.21
  6. Step 6: Final answer
    x = 3,970.67

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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.