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Finding the Fourth Proportional to 18,809.10, 25,961.22 and 10,856.10

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Solution

The fourth proportional to 18,809.10, 25,961.22 and 10,856.10 is: 14,984.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,809.10 : 25,961.22 = 10,856.10 : x
  2. Step 2: Convert to fraction form
    18,809.10/25,961.22 = 10,856.10/x
  3. Step 3: Cross multiply
    18,809.10x = 25,961.22 × 10,856.10
  4. Step 4: Simplify right side
    18,809.10x = 281,837,600.44
  5. Step 5: Solve for x
    x = 281,837,600.44/18,809.10
  6. Step 6: Final answer
    x = 14,984.11

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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.