Home / 3,519.60-5,279.40-2,137.20

Finding the Fourth Proportional to 3,519.60, 5,279.40 and 2,137.20

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Solution

The fourth proportional to 3,519.60, 5,279.40 and 2,137.20 is: 3,205.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,519.60 : 5,279.40 = 2,137.20 : x
  2. Step 2: Convert to fraction form
    3,519.60/5,279.40 = 2,137.20/x
  3. Step 3: Cross multiply
    3,519.60x = 5,279.40 × 2,137.20
  4. Step 4: Simplify right side
    3,519.60x = 11,283,133.68
  5. Step 5: Solve for x
    x = 11,283,133.68/3,519.60
  6. Step 6: Final answer
    x = 3,205.80

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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.