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Finding the Fourth Proportional to 18,756,093.20, 28,134,139.80 and 11,197,821.20

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Solution

The fourth proportional to 18,756,093.20, 28,134,139.80 and 11,197,821.20 is: 16,796,731.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,756,093.20 : 28,134,139.80 = 11,197,821.20 : x
  2. Step 2: Convert to fraction form
    18,756,093.20/28,134,139.80 = 11,197,821.20/x
  3. Step 3: Cross multiply
    18,756,093.20x = 28,134,139.80 × 11,197,821.20
  4. Step 4: Simplify right side
    18,756,093.20x = 315,041,067,096,203.75
  5. Step 5: Solve for x
    x = 315,041,067,096,203.75/18,756,093.20
  6. Step 6: Final answer
    x = 16,796,731.80

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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.