Home / 20,105.97-27,747.72-11,153.40

Finding the Fourth Proportional to 20,105.97, 27,747.72 and 11,153.40

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Solution

The fourth proportional to 20,105.97, 27,747.72 and 11,153.40 is: 15,392.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,105.97 : 27,747.72 = 11,153.40 : x
  2. Step 2: Convert to fraction form
    20,105.97/27,747.72 = 11,153.40/x
  3. Step 3: Cross multiply
    20,105.97x = 27,747.72 × 11,153.40
  4. Step 4: Simplify right side
    20,105.97x = 309,481,420.25
  5. Step 5: Solve for x
    x = 309,481,420.25/20,105.97
  6. Step 6: Final answer
    x = 15,392.51

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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.