Home / 39,634.88-54,695.78-21,729.56

Finding the Fourth Proportional to 39,634.88, 54,695.78 and 21,729.56

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Solution

The fourth proportional to 39,634.88, 54,695.78 and 21,729.56 is: 29,986.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,634.88 : 54,695.78 = 21,729.56 : x
  2. Step 2: Convert to fraction form
    39,634.88/54,695.78 = 21,729.56/x
  3. Step 3: Cross multiply
    39,634.88x = 54,695.78 × 21,729.56
  4. Step 4: Simplify right side
    39,634.88x = 1,188,515,233.26
  5. Step 5: Solve for x
    x = 1,188,515,233.26/39,634.88
  6. Step 6: Final answer
    x = 29,986.60

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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.