Home / 20,120.83-27,765.43-11,168.33

Finding the Fourth Proportional to 20,120.83, 27,765.43 and 11,168.33

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Solution

The fourth proportional to 20,120.83, 27,765.43 and 11,168.33 is: 15,411.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.83 : 27,765.43 = 11,168.33 : x
  2. Step 2: Convert to fraction form
    20,120.83/27,765.43 = 11,168.33/x
  3. Step 3: Cross multiply
    20,120.83x = 27,765.43 × 11,168.33
  4. Step 4: Simplify right side
    20,120.83x = 310,093,318.08
  5. Step 5: Solve for x
    x = 310,093,318.08/20,120.83
  6. Step 6: Final answer
    x = 15,411.56

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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.