Home / 20,955.90-28,910.94-11,998.61

Finding the Fourth Proportional to 20,955.90, 28,910.94 and 11,998.61

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Solution

The fourth proportional to 20,955.90, 28,910.94 and 11,998.61 is: 16,553.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,955.90 : 28,910.94 = 11,998.61 : x
  2. Step 2: Convert to fraction form
    20,955.90/28,910.94 = 11,998.61/x
  3. Step 3: Cross multiply
    20,955.90x = 28,910.94 × 11,998.61
  4. Step 4: Simplify right side
    20,955.90x = 346,890,949.24
  5. Step 5: Solve for x
    x = 346,890,949.24/20,955.90
  6. Step 6: Final answer
    x = 16,553.38

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Double scale
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Similar ratio
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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.