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Finding the Fourth Proportional to 18,811,653.86, 28,206,808.23 and 17,206,745.78

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Solution

The fourth proportional to 18,811,653.86, 28,206,808.23 and 17,206,745.78 is: 25,800,356.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,811,653.86 : 28,206,808.23 = 17,206,745.78 : x
  2. Step 2: Convert to fraction form
    18,811,653.86/28,206,808.23 = 17,206,745.78/x
  3. Step 3: Cross multiply
    18,811,653.86x = 28,206,808.23 × 17,206,745.78
  4. Step 4: Simplify right side
    18,811,653.86x = 485,347,378,478,821.81
  5. Step 5: Solve for x
    x = 485,347,378,478,821.81/18,811,653.86
  6. Step 6: Final answer
    x = 25,800,356.63

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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.