Home / 12,143.66-18,214.84-3,378.64

Finding the Fourth Proportional to 12,143.66, 18,214.84 and 3,378.64

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Solution

The fourth proportional to 12,143.66, 18,214.84 and 3,378.64 is: 5,067.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,143.66 : 18,214.84 = 3,378.64 : x
  2. Step 2: Convert to fraction form
    12,143.66/18,214.84 = 3,378.64/x
  3. Step 3: Cross multiply
    12,143.66x = 18,214.84 × 3,378.64
  4. Step 4: Simplify right side
    12,143.66x = 61,541,387.02
  5. Step 5: Solve for x
    x = 61,541,387.02/12,143.66
  6. Step 6: Final answer
    x = 5,067.78

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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.