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Finding the Fourth Proportional to 18,661.56, 25,744.62 and 10,702.20

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Solution

The fourth proportional to 18,661.56, 25,744.62 and 10,702.20 is: 14,764.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,661.56 : 25,744.62 = 10,702.20 : x
  2. Step 2: Convert to fraction form
    18,661.56/25,744.62 = 10,702.20/x
  3. Step 3: Cross multiply
    18,661.56x = 25,744.62 × 10,702.20
  4. Step 4: Simplify right side
    18,661.56x = 275,524,072.16
  5. Step 5: Solve for x
    x = 275,524,072.16/18,661.56
  6. Step 6: Final answer
    x = 14,764.26

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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.