Home / 20,102.39-27,738.32-11,149.97

Finding the Fourth Proportional to 20,102.39, 27,738.32 and 11,149.97

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Solution

The fourth proportional to 20,102.39, 27,738.32 and 11,149.97 is: 15,385.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,102.39 : 27,738.32 = 11,149.97 : x
  2. Step 2: Convert to fraction form
    20,102.39/27,738.32 = 11,149.97/x
  3. Step 3: Cross multiply
    20,102.39x = 27,738.32 × 11,149.97
  4. Step 4: Simplify right side
    20,102.39x = 309,281,241.41
  5. Step 5: Solve for x
    x = 309,281,241.41/20,102.39
  6. Step 6: Final answer
    x = 15,385.30

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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.