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Finding the Fourth Proportional to 18,959.57, 28,416.29 and 13,414.51

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Solution

The fourth proportional to 18,959.57, 28,416.29 and 13,414.51 is: 20,105.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,959.57 : 28,416.29 = 13,414.51 : x
  2. Step 2: Convert to fraction form
    18,959.57/28,416.29 = 13,414.51/x
  3. Step 3: Cross multiply
    18,959.57x = 28,416.29 × 13,414.51
  4. Step 4: Simplify right side
    18,959.57x = 381,190,468.25
  5. Step 5: Solve for x
    x = 381,190,468.25/18,959.57
  6. Step 6: Final answer
    x = 20,105.44

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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.