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Finding the Fourth Proportional to 19,696.80, 29,512.80 and 16,910.40

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Solution

The fourth proportional to 19,696.80, 29,512.80 and 16,910.40 is: 25,337.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,696.80 : 29,512.80 = 16,910.40 : x
  2. Step 2: Convert to fraction form
    19,696.80/29,512.80 = 16,910.40/x
  3. Step 3: Cross multiply
    19,696.80x = 29,512.80 × 16,910.40
  4. Step 4: Simplify right side
    19,696.80x = 499,073,253.12
  5. Step 5: Solve for x
    x = 499,073,253.12/19,696.80
  6. Step 6: Final answer
    x = 25,337.78

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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.