Home / 3,821.29-5,273.63-2,142.80

Finding the Fourth Proportional to 3,821.29, 5,273.63 and 2,142.80

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Solution

The fourth proportional to 3,821.29, 5,273.63 and 2,142.80 is: 2,957.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,821.29 : 5,273.63 = 2,142.80 : x
  2. Step 2: Convert to fraction form
    3,821.29/5,273.63 = 2,142.80/x
  3. Step 3: Cross multiply
    3,821.29x = 5,273.63 × 2,142.80
  4. Step 4: Simplify right side
    3,821.29x = 11,300,339.93
  5. Step 5: Solve for x
    x = 11,300,339.93/3,821.29
  6. Step 6: Final answer
    x = 2,957.21

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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.