Home / 12,278.60-18,414.53-3,391.81

Finding the Fourth Proportional to 12,278.60, 18,414.53 and 3,391.81

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Solution

The fourth proportional to 12,278.60, 18,414.53 and 3,391.81 is: 5,086.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,278.60 : 18,414.53 = 3,391.81 : x
  2. Step 2: Convert to fraction form
    12,278.60/18,414.53 = 3,391.81/x
  3. Step 3: Cross multiply
    12,278.60x = 18,414.53 × 3,391.81
  4. Step 4: Simplify right side
    12,278.60x = 62,458,494.93
  5. Step 5: Solve for x
    x = 62,458,494.93/12,278.60
  6. Step 6: Final answer
    x = 5,086.78

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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.