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Finding the Fourth Proportional to 13,407,906.30, 20,111,859.45 and 12,568,098.30

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Solution

The fourth proportional to 13,407,906.30, 20,111,859.45 and 12,568,098.30 is: 18,852,147.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,407,906.30 : 20,111,859.45 = 12,568,098.30 : x
  2. Step 2: Convert to fraction form
    13,407,906.30/20,111,859.45 = 12,568,098.30/x
  3. Step 3: Cross multiply
    13,407,906.30x = 20,111,859.45 × 12,568,098.30
  4. Step 4: Simplify right side
    13,407,906.30x = 252,767,826,563,383.94
  5. Step 5: Solve for x
    x = 252,767,826,563,383.94/13,407,906.30
  6. Step 6: Final answer
    x = 18,852,147.45

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.