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Finding the Fourth Proportional to 18,693,873.60, 28,040,810.40 and 10,631,716.80

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Solution

The fourth proportional to 18,693,873.60, 28,040,810.40 and 10,631,716.80 is: 15,947,575.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,693,873.60 : 28,040,810.40 = 10,631,716.80 : x
  2. Step 2: Convert to fraction form
    18,693,873.60/28,040,810.40 = 10,631,716.80/x
  3. Step 3: Cross multiply
    18,693,873.60x = 28,040,810.40 × 10,631,716.80
  4. Step 4: Simplify right side
    18,693,873.60x = 298,121,955,015,294.75
  5. Step 5: Solve for x
    x = 298,121,955,015,294.75/18,693,873.60
  6. Step 6: Final answer
    x = 15,947,575.20

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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.