Home / 20,131.83-27,781.38-11,179.08

Finding the Fourth Proportional to 20,131.83, 27,781.38 and 11,179.08

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Solution

The fourth proportional to 20,131.83, 27,781.38 and 11,179.08 is: 15,426.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,131.83 : 27,781.38 = 11,179.08 : x
  2. Step 2: Convert to fraction form
    20,131.83/27,781.38 = 11,179.08/x
  3. Step 3: Cross multiply
    20,131.83x = 27,781.38 × 11,179.08
  4. Step 4: Simplify right side
    20,131.83x = 310,570,269.53
  5. Step 5: Solve for x
    x = 310,570,269.53/20,131.83
  6. Step 6: Final answer
    x = 15,426.83

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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.