Home / 12,178.28-18,272.46-4,387.88

Finding the Fourth Proportional to 12,178.28, 18,272.46 and 4,387.88

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Solution

The fourth proportional to 12,178.28, 18,272.46 and 4,387.88 is: 6,583.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,178.28 : 18,272.46 = 4,387.88 : x
  2. Step 2: Convert to fraction form
    12,178.28/18,272.46 = 4,387.88/x
  3. Step 3: Cross multiply
    12,178.28x = 18,272.46 × 4,387.88
  4. Step 4: Simplify right side
    12,178.28x = 80,177,361.78
  5. Step 5: Solve for x
    x = 80,177,361.78/12,178.28
  6. Step 6: Final answer
    x = 6,583.64

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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.