Home / 3,821.39-5,273.50-2,142.80

Finding the Fourth Proportional to 3,821.39, 5,273.50 and 2,142.80

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Solution

The fourth proportional to 3,821.39, 5,273.50 and 2,142.80 is: 2,957.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,821.39 : 5,273.50 = 2,142.80 : x
  2. Step 2: Convert to fraction form
    3,821.39/5,273.50 = 2,142.80/x
  3. Step 3: Cross multiply
    3,821.39x = 5,273.50 × 2,142.80
  4. Step 4: Simplify right side
    3,821.39x = 11,300,055.80
  5. Step 5: Solve for x
    x = 11,300,055.80/3,821.39
  6. Step 6: Final answer
    x = 2,957.05

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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.