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Finding the Fourth Proportional to 18,894,961.20, 28,342,441.80 and 12,170,967.60

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Solution

The fourth proportional to 18,894,961.20, 28,342,441.80 and 12,170,967.60 is: 18,256,451.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,894,961.20 : 28,342,441.80 = 12,170,967.60 : x
  2. Step 2: Convert to fraction form
    18,894,961.20/28,342,441.80 = 12,170,967.60/x
  3. Step 3: Cross multiply
    18,894,961.20x = 28,342,441.80 × 12,170,967.60
  4. Step 4: Simplify right side
    18,894,961.20x = 344,954,940,852,685.69
  5. Step 5: Solve for x
    x = 344,954,940,852,685.69/18,894,961.20
  6. Step 6: Final answer
    x = 18,256,451.40

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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.