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Finding the Fourth Proportional to 39,843.64, 54,982.22 and 21,940.20

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Solution

The fourth proportional to 39,843.64, 54,982.22 and 21,940.20 is: 30,276.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,843.64 : 54,982.22 = 21,940.20 : x
  2. Step 2: Convert to fraction form
    39,843.64/54,982.22 = 21,940.20/x
  3. Step 3: Cross multiply
    39,843.64x = 54,982.22 × 21,940.20
  4. Step 4: Simplify right side
    39,843.64x = 1,206,320,903.24
  5. Step 5: Solve for x
    x = 1,206,320,903.24/39,843.64
  6. Step 6: Final answer
    x = 30,276.37

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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.