Home / 20,121.12-27,766.75-11,168.73

Finding the Fourth Proportional to 20,121.12, 27,766.75 and 11,168.73

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Solution

The fourth proportional to 20,121.12, 27,766.75 and 11,168.73 is: 15,412.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.12 : 27,766.75 = 11,168.73 : x
  2. Step 2: Convert to fraction form
    20,121.12/27,766.75 = 11,168.73/x
  3. Step 3: Cross multiply
    20,121.12x = 27,766.75 × 11,168.73
  4. Step 4: Simplify right side
    20,121.12x = 310,119,333.73
  5. Step 5: Solve for x
    x = 310,119,333.73/20,121.12
  6. Step 6: Final answer
    x = 15,412.63

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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.