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Finding the Fourth Proportional to 18,410.61, 25,405.44 and 10,856.58

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Solution

The fourth proportional to 18,410.61, 25,405.44 and 10,856.58 is: 14,981.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,410.61 : 25,405.44 = 10,856.58 : x
  2. Step 2: Convert to fraction form
    18,410.61/25,405.44 = 10,856.58/x
  3. Step 3: Cross multiply
    18,410.61x = 25,405.44 × 10,856.58
  4. Step 4: Simplify right side
    18,410.61x = 275,816,191.80
  5. Step 5: Solve for x
    x = 275,816,191.80/18,410.61
  6. Step 6: Final answer
    x = 14,981.37

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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.