Home / 20,143.49-27,796.78-11,190.43

Finding the Fourth Proportional to 20,143.49, 27,796.78 and 11,190.43

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Solution

The fourth proportional to 20,143.49, 27,796.78 and 11,190.43 is: 15,442.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.49 : 27,796.78 = 11,190.43 : x
  2. Step 2: Convert to fraction form
    20,143.49/27,796.78 = 11,190.43/x
  3. Step 3: Cross multiply
    20,143.49x = 27,796.78 × 11,190.43
  4. Step 4: Simplify right side
    20,143.49x = 311,057,920.82
  5. Step 5: Solve for x
    x = 311,057,920.82/20,143.49
  6. Step 6: Final answer
    x = 15,442.11

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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.