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Finding the Fourth Proportional to 18,806,439.60, 28,209,659.40 and 17,672,698.80

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Solution

The fourth proportional to 18,806,439.60, 28,209,659.40 and 17,672,698.80 is: 26,509,048.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,806,439.60 : 28,209,659.40 = 17,672,698.80 : x
  2. Step 2: Convert to fraction form
    18,806,439.60/28,209,659.40 = 17,672,698.80/x
  3. Step 3: Cross multiply
    18,806,439.60x = 28,209,659.40 × 17,672,698.80
  4. Step 4: Simplify right side
    18,806,439.60x = 498,540,813,826,788.69
  5. Step 5: Solve for x
    x = 498,540,813,826,788.69/18,806,439.60
  6. Step 6: Final answer
    x = 26,509,048.20

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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.