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Finding the Fourth Proportional to 28,979,808.60, 43,469,712.90 and 20,476,752.60

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Solution

The fourth proportional to 28,979,808.60, 43,469,712.90 and 20,476,752.60 is: 30,715,128.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,979,808.60 : 43,469,712.90 = 20,476,752.60 : x
  2. Step 2: Convert to fraction form
    28,979,808.60/43,469,712.90 = 20,476,752.60/x
  3. Step 3: Cross multiply
    28,979,808.60x = 43,469,712.90 × 20,476,752.60
  4. Step 4: Simplify right side
    28,979,808.60x = 890,118,556,646,328.62
  5. Step 5: Solve for x
    x = 890,118,556,646,328.62/28,979,808.60
  6. Step 6: Final answer
    x = 30,715,128.90

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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.