Home / 20,122.80-27,768.18-11,170.32

Finding the Fourth Proportional to 20,122.80, 27,768.18 and 11,170.32

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Solution

The fourth proportional to 20,122.80, 27,768.18 and 11,170.32 is: 15,414.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,122.80 : 27,768.18 = 11,170.32 : x
  2. Step 2: Convert to fraction form
    20,122.80/27,768.18 = 11,170.32/x
  3. Step 3: Cross multiply
    20,122.80x = 27,768.18 × 11,170.32
  4. Step 4: Simplify right side
    20,122.80x = 310,179,456.42
  5. Step 5: Solve for x
    x = 310,179,456.42/20,122.80
  6. Step 6: Final answer
    x = 15,414.33

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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.