Home / 3,821.85-5,274.37-2,143.80

Finding the Fourth Proportional to 3,821.85, 5,274.37 and 2,143.80

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Solution

The fourth proportional to 3,821.85, 5,274.37 and 2,143.80 is: 2,958.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,821.85 : 5,274.37 = 2,143.80 : x
  2. Step 2: Convert to fraction form
    3,821.85/5,274.37 = 2,143.80/x
  3. Step 3: Cross multiply
    3,821.85x = 5,274.37 × 2,143.80
  4. Step 4: Simplify right side
    3,821.85x = 11,307,197.09
  5. Step 5: Solve for x
    x = 11,307,197.09/3,821.85
  6. Step 6: Final answer
    x = 2,958.57

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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.