Home / 20,135.80-27,791.36-12,863.22

Finding the Fourth Proportional to 20,135.80, 27,791.36 and 12,863.22

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Solution

The fourth proportional to 20,135.80, 27,791.36 and 12,863.22 is: 17,753.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,135.80 : 27,791.36 = 12,863.22 : x
  2. Step 2: Convert to fraction form
    20,135.80/27,791.36 = 12,863.22/x
  3. Step 3: Cross multiply
    20,135.80x = 27,791.36 × 12,863.22
  4. Step 4: Simplify right side
    20,135.80x = 357,486,377.78
  5. Step 5: Solve for x
    x = 357,486,377.78/20,135.80
  6. Step 6: Final answer
    x = 17,753.77

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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.