Home / 20,135.80-27,786.22-11,182.78

Finding the Fourth Proportional to 20,135.80, 27,786.22 and 11,182.78

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Solution

The fourth proportional to 20,135.80, 27,786.22 and 11,182.78 is: 15,431.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,135.80 : 27,786.22 = 11,182.78 : x
  2. Step 2: Convert to fraction form
    20,135.80/27,786.22 = 11,182.78/x
  3. Step 3: Cross multiply
    20,135.80x = 27,786.22 × 11,182.78
  4. Step 4: Simplify right side
    20,135.80x = 310,727,185.29
  5. Step 5: Solve for x
    x = 310,727,185.29/20,135.80
  6. Step 6: Final answer
    x = 15,431.58

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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.