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Finding the Fourth Proportional to 18,511, 25,545.20 and 10,127.68

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Solution

The fourth proportional to 18,511, 25,545.20 and 10,127.68 is: 13,976.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,511 : 25,545.20 = 10,127.68 : x
  2. Step 2: Convert to fraction form
    18,511/25,545.20 = 10,127.68/x
  3. Step 3: Cross multiply
    18,511x = 25,545.20 × 10,127.68
  4. Step 4: Simplify right side
    18,511x = 258,713,611.14
  5. Step 5: Solve for x
    x = 258,713,611.14/18,511
  6. Step 6: Final answer
    x = 13,976.21

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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.