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Finding the Fourth Proportional to 18,889,579.80, 28,397,355.30 and 16,118,213.40

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Solution

The fourth proportional to 18,889,579.80, 28,397,355.30 and 16,118,213.40 is: 24,231,064.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,889,579.80 : 28,397,355.30 = 16,118,213.40 : x
  2. Step 2: Convert to fraction form
    18,889,579.80/28,397,355.30 = 16,118,213.40/x
  3. Step 3: Cross multiply
    18,889,579.80x = 28,397,355.30 × 16,118,213.40
  4. Step 4: Simplify right side
    18,889,579.80x = 457,714,632,721,021.06
  5. Step 5: Solve for x
    x = 457,714,632,721,021.06/18,889,579.80
  6. Step 6: Final answer
    x = 24,231,064.83

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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.