Home / 20,251.90-27,936.39-11,866.78

Finding the Fourth Proportional to 20,251.90, 27,936.39 and 11,866.78

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Solution

The fourth proportional to 20,251.90, 27,936.39 and 11,866.78 is: 16,369.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,251.90 : 27,936.39 = 11,866.78 : x
  2. Step 2: Convert to fraction form
    20,251.90/27,936.39 = 11,866.78/x
  3. Step 3: Cross multiply
    20,251.90x = 27,936.39 × 11,866.78
  4. Step 4: Simplify right side
    20,251.90x = 331,514,994.12
  5. Step 5: Solve for x
    x = 331,514,994.12/20,251.90
  6. Step 6: Final answer
    x = 16,369.57

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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.