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Finding the Fourth Proportional to 18,693,307.20, 27,977,752.80 and 13,561,147.20

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Solution

The fourth proportional to 18,693,307.20, 27,977,752.80 and 13,561,147.20 is: 20,296,591.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,693,307.20 : 27,977,752.80 = 13,561,147.20 : x
  2. Step 2: Convert to fraction form
    18,693,307.20/27,977,752.80 = 13,561,147.20/x
  3. Step 3: Cross multiply
    18,693,307.20x = 27,977,752.80 × 13,561,147.20
  4. Step 4: Simplify right side
    18,693,307.20x = 379,410,424,046,012.12
  5. Step 5: Solve for x
    x = 379,410,424,046,012.12/18,693,307.20
  6. Step 6: Final answer
    x = 20,296,591.72

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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.