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Finding the Fourth Proportional to 18,636.75, 25,718.72 and 10,253.25

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Solution

The fourth proportional to 18,636.75, 25,718.72 and 10,253.25 is: 14,149.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,636.75 : 25,718.72 = 10,253.25 : x
  2. Step 2: Convert to fraction form
    18,636.75/25,718.72 = 10,253.25/x
  3. Step 3: Cross multiply
    18,636.75x = 25,718.72 × 10,253.25
  4. Step 4: Simplify right side
    18,636.75x = 263,700,414.57
  5. Step 5: Solve for x
    x = 263,700,414.57/18,636.75
  6. Step 6: Final answer
    x = 14,149.49

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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.