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Finding the Fourth Proportional to 39,993.80, 55,190.98 and 21,844.43

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Solution

The fourth proportional to 39,993.80, 55,190.98 and 21,844.43 is: 30,145.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,993.80 : 55,190.98 = 21,844.43 : x
  2. Step 2: Convert to fraction form
    39,993.80/55,190.98 = 21,844.43/x
  3. Step 3: Cross multiply
    39,993.80x = 55,190.98 × 21,844.43
  4. Step 4: Simplify right side
    39,993.80x = 1,205,615,499.24
  5. Step 5: Solve for x
    x = 1,205,615,499.24/39,993.80
  6. Step 6: Final answer
    x = 30,145.06

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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.