Home / 20,893.82-31,348.71-12,579.75

Finding the Fourth Proportional to 20,893.82, 31,348.71 and 12,579.75

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Solution

The fourth proportional to 20,893.82, 31,348.71 and 12,579.75 is: 18,874.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,893.82 : 31,348.71 = 12,579.75 : x
  2. Step 2: Convert to fraction form
    20,893.82/31,348.71 = 12,579.75/x
  3. Step 3: Cross multiply
    20,893.82x = 31,348.71 × 12,579.75
  4. Step 4: Simplify right side
    20,893.82x = 394,358,934.62
  5. Step 5: Solve for x
    x = 394,358,934.62/20,893.82
  6. Step 6: Final answer
    x = 18,874.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.