Home / 39,286.11-54,213.79-21,380.73

Finding the Fourth Proportional to 39,286.11, 54,213.79 and 21,380.73

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Solution

The fourth proportional to 39,286.11, 54,213.79 and 21,380.73 is: 29,504.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,286.11 : 54,213.79 = 21,380.73 : x
  2. Step 2: Convert to fraction form
    39,286.11/54,213.79 = 21,380.73/x
  3. Step 3: Cross multiply
    39,286.11x = 54,213.79 × 21,380.73
  4. Step 4: Simplify right side
    39,286.11x = 1,159,130,406.27
  5. Step 5: Solve for x
    x = 1,159,130,406.27/39,286.11
  6. Step 6: Final answer
    x = 29,504.84

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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.