Home / 20,121.33-27,766.12-11,168.83

Finding the Fourth Proportional to 20,121.33, 27,766.12 and 11,168.83

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Solution

The fourth proportional to 20,121.33, 27,766.12 and 11,168.83 is: 15,412.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.33 : 27,766.12 = 11,168.83 : x
  2. Step 2: Convert to fraction form
    20,121.33/27,766.12 = 11,168.83/x
  3. Step 3: Cross multiply
    20,121.33x = 27,766.12 × 11,168.83
  4. Step 4: Simplify right side
    20,121.33x = 310,114,879.36
  5. Step 5: Solve for x
    x = 310,114,879.36/20,121.33
  6. Step 6: Final answer
    x = 15,412.25

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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.