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Finding the Fourth Proportional to 13,612,806.10, 20,419,209.15 and 13,612,806.10

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Solution

The fourth proportional to 13,612,806.10, 20,419,209.15 and 13,612,806.10 is: 20,419,209.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612,806.10 : 20,419,209.15 = 13,612,806.10 : x
  2. Step 2: Convert to fraction form
    13,612,806.10/20,419,209.15 = 13,612,806.10/x
  3. Step 3: Cross multiply
    13,612,806.10x = 20,419,209.15 × 13,612,806.10
  4. Step 4: Simplify right side
    13,612,806.10x = 277,962,734,874,295.78
  5. Step 5: Solve for x
    x = 277,962,734,874,295.78/13,612,806.10
  6. Step 6: Final answer
    x = 20,419,209.15

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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.