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Finding the Fourth Proportional to 28,979,424.80, 43,469,137.20 and 18,901,728.80

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Solution

The fourth proportional to 28,979,424.80, 43,469,137.20 and 18,901,728.80 is: 28,352,593.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,979,424.80 : 43,469,137.20 = 18,901,728.80 : x
  2. Step 2: Convert to fraction form
    28,979,424.80/43,469,137.20 = 18,901,728.80/x
  3. Step 3: Cross multiply
    28,979,424.80x = 43,469,137.20 × 18,901,728.80
  4. Step 4: Simplify right side
    28,979,424.80x = 821,641,842,524,391.50
  5. Step 5: Solve for x
    x = 821,641,842,524,391.50/28,979,424.80
  6. Step 6: Final answer
    x = 28,352,593.20

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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.