Home / 3,819.60-5,270.70-2,140.79

Finding the Fourth Proportional to 3,819.60, 5,270.70 and 2,140.79

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Solution

The fourth proportional to 3,819.60, 5,270.70 and 2,140.79 is: 2,954.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,819.60 : 5,270.70 = 2,140.79 : x
  2. Step 2: Convert to fraction form
    3,819.60/5,270.70 = 2,140.79/x
  3. Step 3: Cross multiply
    3,819.60x = 5,270.70 × 2,140.79
  4. Step 4: Simplify right side
    3,819.60x = 11,283,435.50
  5. Step 5: Solve for x
    x = 11,283,435.50/3,819.60
  6. Step 6: Final answer
    x = 2,954.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.