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Finding the Fourth Proportional to 39,993.30, 55,190.30 and 21,843.94

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Solution

The fourth proportional to 39,993.30, 55,190.30 and 21,843.94 is: 30,144.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,993.30 : 55,190.30 = 21,843.94 : x
  2. Step 2: Convert to fraction form
    39,993.30/55,190.30 = 21,843.94/x
  3. Step 3: Cross multiply
    39,993.30x = 55,190.30 × 21,843.94
  4. Step 4: Simplify right side
    39,993.30x = 1,205,573,216.61
  5. Step 5: Solve for x
    x = 1,205,573,216.61/39,993.30
  6. Step 6: Final answer
    x = 30,144.38

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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.