Home / 20,105.39-27,736.34-12,553.61

Finding the Fourth Proportional to 20,105.39, 27,736.34 and 12,553.61

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Solution

The fourth proportional to 20,105.39, 27,736.34 and 12,553.61 is: 17,318.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,105.39 : 27,736.34 = 12,553.61 : x
  2. Step 2: Convert to fraction form
    20,105.39/27,736.34 = 12,553.61/x
  3. Step 3: Cross multiply
    20,105.39x = 27,736.34 × 12,553.61
  4. Step 4: Simplify right side
    20,105.39x = 348,190,993.74
  5. Step 5: Solve for x
    x = 348,190,993.74/20,105.39
  6. Step 6: Final answer
    x = 17,318.30

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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.