Home / 3,879.40-5,813.34-2,145.64

Finding the Fourth Proportional to 3,879.40, 5,813.34 and 2,145.64

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Solution

The fourth proportional to 3,879.40, 5,813.34 and 2,145.64 is: 3,215.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.40 : 5,813.34 = 2,145.64 : x
  2. Step 2: Convert to fraction form
    3,879.40/5,813.34 = 2,145.64/x
  3. Step 3: Cross multiply
    3,879.40x = 5,813.34 × 2,145.64
  4. Step 4: Simplify right side
    3,879.40x = 12,473,334.84
  5. Step 5: Solve for x
    x = 12,473,334.84/3,879.40
  6. Step 6: Final answer
    x = 3,215.27

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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.