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Finding the Fourth Proportional to 12,479,801.80, 18,719,702.70 and 4,392,713.20

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Solution

The fourth proportional to 12,479,801.80, 18,719,702.70 and 4,392,713.20 is: 6,589,069.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479,801.80 : 18,719,702.70 = 4,392,713.20 : x
  2. Step 2: Convert to fraction form
    12,479,801.80/18,719,702.70 = 4,392,713.20/x
  3. Step 3: Cross multiply
    12,479,801.80x = 18,719,702.70 × 4,392,713.20
  4. Step 4: Simplify right side
    12,479,801.80x = 82,230,285,150,365.64
  5. Step 5: Solve for x
    x = 82,230,285,150,365.64/12,479,801.80
  6. Step 6: Final answer
    x = 6,589,069.80

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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.