Home / 12,078.86-18,119.97-3,759.48

Finding the Fourth Proportional to 12,078.86, 18,119.97 and 3,759.48

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Solution

The fourth proportional to 12,078.86, 18,119.97 and 3,759.48 is: 5,639.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,078.86 : 18,119.97 = 3,759.48 : x
  2. Step 2: Convert to fraction form
    12,078.86/18,119.97 = 3,759.48/x
  3. Step 3: Cross multiply
    12,078.86x = 18,119.97 × 3,759.48
  4. Step 4: Simplify right side
    12,078.86x = 68,121,664.82
  5. Step 5: Solve for x
    x = 68,121,664.82/12,078.86
  6. Step 6: Final answer
    x = 5,639.75

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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.