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Finding the Fourth Proportional to 13,486,517.80, 20,229,776.70 and 13,392,039.40

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Solution

The fourth proportional to 13,486,517.80, 20,229,776.70 and 13,392,039.40 is: 20,088,059.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,486,517.80 : 20,229,776.70 = 13,392,039.40 : x
  2. Step 2: Convert to fraction form
    13,486,517.80/20,229,776.70 = 13,392,039.40/x
  3. Step 3: Cross multiply
    13,486,517.80x = 20,229,776.70 × 13,392,039.40
  4. Step 4: Simplify right side
    13,486,517.80x = 270,917,966,619,601.97
  5. Step 5: Solve for x
    x = 270,917,966,619,601.97/13,486,517.80
  6. Step 6: Final answer
    x = 20,088,059.10

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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.