Home / 20,120.13-27,764.44-11,167.61

Finding the Fourth Proportional to 20,120.13, 27,764.44 and 11,167.61

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Solution

The fourth proportional to 20,120.13, 27,764.44 and 11,167.61 is: 15,410.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.13 : 27,764.44 = 11,167.61 : x
  2. Step 2: Convert to fraction form
    20,120.13/27,764.44 = 11,167.61/x
  3. Step 3: Cross multiply
    20,120.13x = 27,764.44 × 11,167.61
  4. Step 4: Simplify right side
    20,120.13x = 310,062,271.05
  5. Step 5: Solve for x
    x = 310,062,271.05/20,120.13
  6. Step 6: Final answer
    x = 15,410.55

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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.