Home / 39,679.43-54,759.60-21,774.29

Finding the Fourth Proportional to 39,679.43, 54,759.60 and 21,774.29

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Solution

The fourth proportional to 39,679.43, 54,759.60 and 21,774.29 is: 30,049.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,679.43 : 54,759.60 = 21,774.29 : x
  2. Step 2: Convert to fraction form
    39,679.43/54,759.60 = 21,774.29/x
  3. Step 3: Cross multiply
    39,679.43x = 54,759.60 × 21,774.29
  4. Step 4: Simplify right side
    39,679.43x = 1,192,351,136.89
  5. Step 5: Solve for x
    x = 1,192,351,136.89/39,679.43
  6. Step 6: Final answer
    x = 30,049.61

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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.