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Finding the Fourth Proportional to 18,891,856.80, 28,295,794.80 and 16,372,432.80

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Solution

The fourth proportional to 18,891,856.80, 28,295,794.80 and 16,372,432.80 is: 24,522,258.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,891,856.80 : 28,295,794.80 = 16,372,432.80 : x
  2. Step 2: Convert to fraction form
    18,891,856.80/28,295,794.80 = 16,372,432.80/x
  3. Step 3: Cross multiply
    18,891,856.80x = 28,295,794.80 × 16,372,432.80
  4. Step 4: Simplify right side
    18,891,856.80x = 463,270,998,885,589.50
  5. Step 5: Solve for x
    x = 463,270,998,885,589.50/18,891,856.80
  6. Step 6: Final answer
    x = 24,522,258.65

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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.