Home / 18,531.20-27,785.60-8,672.64

Finding the Fourth Proportional to 18,531.20, 27,785.60 and 8,672.64

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Solution

The fourth proportional to 18,531.20, 27,785.60 and 8,672.64 is: 13,003.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,531.20 : 27,785.60 = 8,672.64 : x
  2. Step 2: Convert to fraction form
    18,531.20/27,785.60 = 8,672.64/x
  3. Step 3: Cross multiply
    18,531.20x = 27,785.60 × 8,672.64
  4. Step 4: Simplify right side
    18,531.20x = 240,974,505.98
  5. Step 5: Solve for x
    x = 240,974,505.98/18,531.20
  6. Step 6: Final answer
    x = 13,003.72

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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.