Home / 20,156.85-27,815.40-12,198.60

Finding the Fourth Proportional to 20,156.85, 27,815.40 and 12,198.60

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Solution

The fourth proportional to 20,156.85, 27,815.40 and 12,198.60 is: 16,833.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,156.85 : 27,815.40 = 12,198.60 : x
  2. Step 2: Convert to fraction form
    20,156.85/27,815.40 = 12,198.60/x
  3. Step 3: Cross multiply
    20,156.85x = 27,815.40 × 12,198.60
  4. Step 4: Simplify right side
    20,156.85x = 339,308,938.44
  5. Step 5: Solve for x
    x = 339,308,938.44/20,156.85
  6. Step 6: Final answer
    x = 16,833.43

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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.