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Finding the Fourth Proportional to 18,785.39, 28,175.18 and 8,253.09

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Solution

The fourth proportional to 18,785.39, 28,175.18 and 8,253.09 is: 12,378.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,785.39 : 28,175.18 = 8,253.09 : x
  2. Step 2: Convert to fraction form
    18,785.39/28,175.18 = 8,253.09/x
  3. Step 3: Cross multiply
    18,785.39x = 28,175.18 × 8,253.09
  4. Step 4: Simplify right side
    18,785.39x = 232,532,255.04
  5. Step 5: Solve for x
    x = 232,532,255.04/18,785.39
  6. Step 6: Final answer
    x = 12,378.36

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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.