Home / 20,135.15-27,789.06-12,177.42

Finding the Fourth Proportional to 20,135.15, 27,789.06 and 12,177.42

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Solution

The fourth proportional to 20,135.15, 27,789.06 and 12,177.42 is: 16,806.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,135.15 : 27,789.06 = 12,177.42 : x
  2. Step 2: Convert to fraction form
    20,135.15/27,789.06 = 12,177.42/x
  3. Step 3: Cross multiply
    20,135.15x = 27,789.06 × 12,177.42
  4. Step 4: Simplify right side
    20,135.15x = 338,399,084.30
  5. Step 5: Solve for x
    x = 338,399,084.30/20,135.15
  6. Step 6: Final answer
    x = 16,806.39

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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.