Home / 20,139.82-27,791.43-12,186.43

Finding the Fourth Proportional to 20,139.82, 27,791.43 and 12,186.43

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Solution

The fourth proportional to 20,139.82, 27,791.43 and 12,186.43 is: 16,816.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.82 : 27,791.43 = 12,186.43 : x
  2. Step 2: Convert to fraction form
    20,139.82/27,791.43 = 12,186.43/x
  3. Step 3: Cross multiply
    20,139.82x = 27,791.43 × 12,186.43
  4. Step 4: Simplify right side
    20,139.82x = 338,678,316.29
  5. Step 5: Solve for x
    x = 338,678,316.29/20,139.82
  6. Step 6: Final answer
    x = 16,816.35

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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.