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Finding the Fourth Proportional to 28,197.90, 38,910.39 and 16,865.10

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Solution

The fourth proportional to 28,197.90, 38,910.39 and 16,865.10 is: 23,272.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,197.90 : 38,910.39 = 16,865.10 : x
  2. Step 2: Convert to fraction form
    28,197.90/38,910.39 = 16,865.10/x
  3. Step 3: Cross multiply
    28,197.90x = 38,910.39 × 16,865.10
  4. Step 4: Simplify right side
    28,197.90x = 656,227,618.39
  5. Step 5: Solve for x
    x = 656,227,618.39/28,197.90
  6. Step 6: Final answer
    x = 23,272.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.