Home / 20,278.38-27,972.49-12,206.42

Finding the Fourth Proportional to 20,278.38, 27,972.49 and 12,206.42

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Solution

The fourth proportional to 20,278.38, 27,972.49 and 12,206.42 is: 16,837.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,278.38 : 27,972.49 = 12,206.42 : x
  2. Step 2: Convert to fraction form
    20,278.38/27,972.49 = 12,206.42/x
  3. Step 3: Cross multiply
    20,278.38x = 27,972.49 × 12,206.42
  4. Step 4: Simplify right side
    20,278.38x = 341,443,961.39
  5. Step 5: Solve for x
    x = 341,443,961.39/20,278.38
  6. Step 6: Final answer
    x = 16,837.83

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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.