Home / 20,186.67-27,860.55-12,120.87

Finding the Fourth Proportional to 20,186.67, 27,860.55 and 12,120.87

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Solution

The fourth proportional to 20,186.67, 27,860.55 and 12,120.87 is: 16,728.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,186.67 : 27,860.55 = 12,120.87 : x
  2. Step 2: Convert to fraction form
    20,186.67/27,860.55 = 12,120.87/x
  3. Step 3: Cross multiply
    20,186.67x = 27,860.55 × 12,120.87
  4. Step 4: Simplify right side
    20,186.67x = 337,694,104.68
  5. Step 5: Solve for x
    x = 337,694,104.68/20,186.67
  6. Step 6: Final answer
    x = 16,728.57

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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.