Home / 21,788.89-30,067.45-12,227.90

Finding the Fourth Proportional to 21,788.89, 30,067.45 and 12,227.90

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Solution

The fourth proportional to 21,788.89, 30,067.45 and 12,227.90 is: 16,873.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,788.89 : 30,067.45 = 12,227.90 : x
  2. Step 2: Convert to fraction form
    21,788.89/30,067.45 = 12,227.90/x
  3. Step 3: Cross multiply
    21,788.89x = 30,067.45 × 12,227.90
  4. Step 4: Simplify right side
    21,788.89x = 367,661,590.95
  5. Step 5: Solve for x
    x = 367,661,590.95/21,788.89
  6. Step 6: Final answer
    x = 16,873.81

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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.