Home / 39,806.72-54,936.60-21,905.12

Finding the Fourth Proportional to 39,806.72, 54,936.60 and 21,905.12

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Solution

The fourth proportional to 39,806.72, 54,936.60 and 21,905.12 is: 30,230.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,806.72 : 54,936.60 = 21,905.12 : x
  2. Step 2: Convert to fraction form
    39,806.72/54,936.60 = 21,905.12/x
  3. Step 3: Cross multiply
    39,806.72x = 54,936.60 × 21,905.12
  4. Step 4: Simplify right side
    39,806.72x = 1,203,392,815.39
  5. Step 5: Solve for x
    x = 1,203,392,815.39/39,806.72
  6. Step 6: Final answer
    x = 30,230.90

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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.