Home / 20,218.70-27,902.39-11,720.85

Finding the Fourth Proportional to 20,218.70, 27,902.39 and 11,720.85

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Solution

The fourth proportional to 20,218.70, 27,902.39 and 11,720.85 is: 16,175.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,218.70 : 27,902.39 = 11,720.85 : x
  2. Step 2: Convert to fraction form
    20,218.70/27,902.39 = 11,720.85/x
  3. Step 3: Cross multiply
    20,218.70x = 27,902.39 × 11,720.85
  4. Step 4: Simplify right side
    20,218.70x = 327,039,669.23
  5. Step 5: Solve for x
    x = 327,039,669.23/20,218.70
  6. Step 6: Final answer
    x = 16,175.11

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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.