Home / 12,121.96-18,167.82-4,322.20

Finding the Fourth Proportional to 12,121.96, 18,167.82 and 4,322.20

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Solution

The fourth proportional to 12,121.96, 18,167.82 and 4,322.20 is: 6,477.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.96 : 18,167.82 = 4,322.20 : x
  2. Step 2: Convert to fraction form
    12,121.96/18,167.82 = 4,322.20/x
  3. Step 3: Cross multiply
    12,121.96x = 18,167.82 × 4,322.20
  4. Step 4: Simplify right side
    12,121.96x = 78,524,951.60
  5. Step 5: Solve for x
    x = 78,524,951.60/12,121.96
  6. Step 6: Final answer
    x = 6,477.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.