Home / 39,817.62-54,945.09-21,909.78

Finding the Fourth Proportional to 39,817.62, 54,945.09 and 21,909.78

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Solution

The fourth proportional to 39,817.62, 54,945.09 and 21,909.78 is: 30,233.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,817.62 : 54,945.09 = 21,909.78 : x
  2. Step 2: Convert to fraction form
    39,817.62/54,945.09 = 21,909.78/x
  3. Step 3: Cross multiply
    39,817.62x = 54,945.09 × 21,909.78
  4. Step 4: Simplify right side
    39,817.62x = 1,203,834,833.98
  5. Step 5: Solve for x
    x = 1,203,834,833.98/39,817.62
  6. Step 6: Final answer
    x = 30,233.72

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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.