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Finding the Fourth Proportional to 18,786,843.20, 28,180,264.80 and 14,530,066.40

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Solution

The fourth proportional to 18,786,843.20, 28,180,264.80 and 14,530,066.40 is: 21,795,099.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,786,843.20 : 28,180,264.80 = 14,530,066.40 : x
  2. Step 2: Convert to fraction form
    18,786,843.20/28,180,264.80 = 14,530,066.40/x
  3. Step 3: Cross multiply
    18,786,843.20x = 28,180,264.80 × 14,530,066.40
  4. Step 4: Simplify right side
    18,786,843.20x = 409,461,118,713,582.75
  5. Step 5: Solve for x
    x = 409,461,118,713,582.75/18,786,843.20
  6. Step 6: Final answer
    x = 21,795,099.60

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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.