Home / 3,821.42-5,273.62-2,143.20

Finding the Fourth Proportional to 3,821.42, 5,273.62 and 2,143.20

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Solution

The fourth proportional to 3,821.42, 5,273.62 and 2,143.20 is: 2,957.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,821.42 : 5,273.62 = 2,143.20 : x
  2. Step 2: Convert to fraction form
    3,821.42/5,273.62 = 2,143.20/x
  3. Step 3: Cross multiply
    3,821.42x = 5,273.62 × 2,143.20
  4. Step 4: Simplify right side
    3,821.42x = 11,302,422.38
  5. Step 5: Solve for x
    x = 11,302,422.38/3,821.42
  6. Step 6: Final answer
    x = 2,957.65

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Half scale
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Double scale
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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.