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Finding the Fourth Proportional to 18,381,191.70, 27,571,787.55 and 15,511,410.30

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Solution

The fourth proportional to 18,381,191.70, 27,571,787.55 and 15,511,410.30 is: 23,267,115.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,381,191.70 : 27,571,787.55 = 15,511,410.30 : x
  2. Step 2: Convert to fraction form
    18,381,191.70/27,571,787.55 = 15,511,410.30/x
  3. Step 3: Cross multiply
    18,381,191.70x = 27,571,787.55 × 15,511,410.30
  4. Step 4: Simplify right side
    18,381,191.70x = 427,677,309,392,481.81
  5. Step 5: Solve for x
    x = 427,677,309,392,481.81/18,381,191.70
  6. Step 6: Final answer
    x = 23,267,115.45

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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.