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Finding the Fourth Proportional to 39,806.80, 54,932.22 and 21,901.80

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Solution

The fourth proportional to 39,806.80, 54,932.22 and 21,901.80 is: 30,223.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,806.80 : 54,932.22 = 21,901.80 : x
  2. Step 2: Convert to fraction form
    39,806.80/54,932.22 = 21,901.80/x
  3. Step 3: Cross multiply
    39,806.80x = 54,932.22 × 21,901.80
  4. Step 4: Simplify right side
    39,806.80x = 1,203,114,496.00
  5. Step 5: Solve for x
    x = 1,203,114,496.00/39,806.80
  6. Step 6: Final answer
    x = 30,223.84

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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.