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Finding the Fourth Proportional to 18,741,626.40, 28,112,439.60 and 8,644,247.40

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Solution

The fourth proportional to 18,741,626.40, 28,112,439.60 and 8,644,247.40 is: 12,966,371.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,741,626.40 : 28,112,439.60 = 8,644,247.40 : x
  2. Step 2: Convert to fraction form
    18,741,626.40/28,112,439.60 = 8,644,247.40/x
  3. Step 3: Cross multiply
    18,741,626.40x = 28,112,439.60 × 8,644,247.40
  4. Step 4: Simplify right side
    18,741,626.40x = 243,010,882,919,957.06
  5. Step 5: Solve for x
    x = 243,010,882,919,957.06/18,741,626.40
  6. Step 6: Final answer
    x = 12,966,371.10

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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.