Home / 12,180.15-18,270.87-3,860.81

Finding the Fourth Proportional to 12,180.15, 18,270.87 and 3,860.81

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Solution

The fourth proportional to 12,180.15, 18,270.87 and 3,860.81 is: 5,791.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,180.15 : 18,270.87 = 3,860.81 : x
  2. Step 2: Convert to fraction form
    12,180.15/18,270.87 = 3,860.81/x
  3. Step 3: Cross multiply
    12,180.15x = 18,270.87 × 3,860.81
  4. Step 4: Simplify right side
    12,180.15x = 70,540,410.54
  5. Step 5: Solve for x
    x = 70,540,410.54/12,180.15
  6. Step 6: Final answer
    x = 5,791.42

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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.