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Finding the Fourth Proportional to 18,791.64, 28,228.14 and 12,214.44

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Solution

The fourth proportional to 18,791.64, 28,228.14 and 12,214.44 is: 18,348.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,791.64 : 28,228.14 = 12,214.44 : x
  2. Step 2: Convert to fraction form
    18,791.64/28,228.14 = 12,214.44/x
  3. Step 3: Cross multiply
    18,791.64x = 28,228.14 × 12,214.44
  4. Step 4: Simplify right side
    18,791.64x = 344,790,922.34
  5. Step 5: Solve for x
    x = 344,790,922.34/18,791.64
  6. Step 6: Final answer
    x = 18,348.10

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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.