Home / 20,122.75-27,770.61-12,166.93

Finding the Fourth Proportional to 20,122.75, 27,770.61 and 12,166.93

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Solution

The fourth proportional to 20,122.75, 27,770.61 and 12,166.93 is: 16,791.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,122.75 : 27,770.61 = 12,166.93 : x
  2. Step 2: Convert to fraction form
    20,122.75/27,770.61 = 12,166.93/x
  3. Step 3: Cross multiply
    20,122.75x = 27,770.61 × 12,166.93
  4. Step 4: Simplify right side
    20,122.75x = 337,883,067.93
  5. Step 5: Solve for x
    x = 337,883,067.93/20,122.75
  6. Step 6: Final answer
    x = 16,791.10

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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.