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Finding the Fourth Proportional to 28,979,993.60, 43,469,990.40 and 20,476,937.60

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Solution

The fourth proportional to 28,979,993.60, 43,469,990.40 and 20,476,937.60 is: 30,715,406.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,979,993.60 : 43,469,990.40 = 20,476,937.60 : x
  2. Step 2: Convert to fraction form
    28,979,993.60/43,469,990.40 = 20,476,937.60/x
  3. Step 3: Cross multiply
    28,979,993.60x = 43,469,990.40 × 20,476,937.60
  4. Step 4: Simplify right side
    28,979,993.60x = 890,132,280,893,399.12
  5. Step 5: Solve for x
    x = 890,132,280,893,399.12/28,979,993.60
  6. Step 6: Final answer
    x = 30,715,406.40

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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.