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Finding the Fourth Proportional to 18,922,178.10, 28,401,211.41 and 11,711,901.54

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Solution

The fourth proportional to 18,922,178.10, 28,401,211.41 and 11,711,901.54 is: 17,578,958.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,922,178.10 : 28,401,211.41 = 11,711,901.54 : x
  2. Step 2: Convert to fraction form
    18,922,178.10/28,401,211.41 = 11,711,901.54/x
  3. Step 3: Cross multiply
    18,922,178.10x = 28,401,211.41 × 11,711,901.54
  4. Step 4: Simplify right side
    18,922,178.10x = 332,632,191,650,644.56
  5. Step 5: Solve for x
    x = 332,632,191,650,644.56/18,922,178.10
  6. Step 6: Final answer
    x = 17,578,958.93

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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.