Home / 20,121.30-27,767.37-11,168.78

Finding the Fourth Proportional to 20,121.30, 27,767.37 and 11,168.78

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Solution

The fourth proportional to 20,121.30, 27,767.37 and 11,168.78 is: 15,412.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.30 : 27,767.37 = 11,168.78 : x
  2. Step 2: Convert to fraction form
    20,121.30/27,767.37 = 11,168.78/x
  3. Step 3: Cross multiply
    20,121.30x = 27,767.37 × 11,168.78
  4. Step 4: Simplify right side
    20,121.30x = 310,127,591.06
  5. Step 5: Solve for x
    x = 310,127,591.06/20,121.30
  6. Step 6: Final answer
    x = 15,412.90

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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.