Home / 3,839.60-5,298.74-2,161.19

Finding the Fourth Proportional to 3,839.60, 5,298.74 and 2,161.19

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Solution

The fourth proportional to 3,839.60, 5,298.74 and 2,161.19 is: 2,982.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,839.60 : 5,298.74 = 2,161.19 : x
  2. Step 2: Convert to fraction form
    3,839.60/5,298.74 = 2,161.19/x
  3. Step 3: Cross multiply
    3,839.60x = 5,298.74 × 2,161.19
  4. Step 4: Simplify right side
    3,839.60x = 11,451,546.60
  5. Step 5: Solve for x
    x = 11,451,546.60/3,839.60
  6. Step 6: Final answer
    x = 2,982.49

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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.