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Finding the Fourth Proportional to 18,940.10, 28,410.14 and 5,792.48

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Solution

The fourth proportional to 18,940.10, 28,410.14 and 5,792.48 is: 8,688.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,940.10 : 28,410.14 = 5,792.48 : x
  2. Step 2: Convert to fraction form
    18,940.10/28,410.14 = 5,792.48/x
  3. Step 3: Cross multiply
    18,940.10x = 28,410.14 × 5,792.48
  4. Step 4: Simplify right side
    18,940.10x = 164,565,167.75
  5. Step 5: Solve for x
    x = 164,565,167.75/18,940.10
  6. Step 6: Final answer
    x = 8,688.72

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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.