Home / 12,190.79-18,286.90-3,426.39

Finding the Fourth Proportional to 12,190.79, 18,286.90 and 3,426.39

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Solution

The fourth proportional to 12,190.79, 18,286.90 and 3,426.39 is: 5,139.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,190.79 : 18,286.90 = 3,426.39 : x
  2. Step 2: Convert to fraction form
    12,190.79/18,286.90 = 3,426.39/x
  3. Step 3: Cross multiply
    12,190.79x = 18,286.90 × 3,426.39
  4. Step 4: Simplify right side
    12,190.79x = 62,658,042.73
  5. Step 5: Solve for x
    x = 62,658,042.73/12,190.79
  6. Step 6: Final answer
    x = 5,139.78

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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.