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Finding the Fourth Proportional to 13,145,905.20, 19,685,680.20 and 10,491,697.20

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Solution

The fourth proportional to 13,145,905.20, 19,685,680.20 and 10,491,697.20 is: 15,711,066.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145,905.20 : 19,685,680.20 = 10,491,697.20 : x
  2. Step 2: Convert to fraction form
    13,145,905.20/19,685,680.20 = 10,491,697.20/x
  3. Step 3: Cross multiply
    13,145,905.20x = 19,685,680.20 × 10,491,697.20
  4. Step 4: Simplify right side
    13,145,905.20x = 206,536,195,834,435.41
  5. Step 5: Solve for x
    x = 206,536,195,834,435.41/13,145,905.20
  6. Step 6: Final answer
    x = 15,711,066.88

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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.