Home / 20,117.55-27,755.78-11,618.54

Finding the Fourth Proportional to 20,117.55, 27,755.78 and 11,618.54

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Solution

The fourth proportional to 20,117.55, 27,755.78 and 11,618.54 is: 16,029.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,117.55 : 27,755.78 = 11,618.54 : x
  2. Step 2: Convert to fraction form
    20,117.55/27,755.78 = 11,618.54/x
  3. Step 3: Cross multiply
    20,117.55x = 27,755.78 × 11,618.54
  4. Step 4: Simplify right side
    20,117.55x = 322,481,612.73
  5. Step 5: Solve for x
    x = 322,481,612.73/20,117.55
  6. Step 6: Final answer
    x = 16,029.87

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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.