Home / 3,979.60-5,969.40-3,059.80

Finding the Fourth Proportional to 3,979.60, 5,969.40 and 3,059.80

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Solution

The fourth proportional to 3,979.60, 5,969.40 and 3,059.80 is: 4,589.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.60 : 5,969.40 = 3,059.80 : x
  2. Step 2: Convert to fraction form
    3,979.60/5,969.40 = 3,059.80/x
  3. Step 3: Cross multiply
    3,979.60x = 5,969.40 × 3,059.80
  4. Step 4: Simplify right side
    3,979.60x = 18,265,170.12
  5. Step 5: Solve for x
    x = 18,265,170.12/3,979.60
  6. Step 6: Final answer
    x = 4,589.70

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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.