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Finding the Fourth Proportional to 20,206,978.80, 30,310,468.20 and 11,682,927.60

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Solution

The fourth proportional to 20,206,978.80, 30,310,468.20 and 11,682,927.60 is: 17,524,391.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,206,978.80 : 30,310,468.20 = 11,682,927.60 : x
  2. Step 2: Convert to fraction form
    20,206,978.80/30,310,468.20 = 11,682,927.60/x
  3. Step 3: Cross multiply
    20,206,978.80x = 30,310,468.20 × 11,682,927.60
  4. Step 4: Simplify right side
    20,206,978.80x = 354,115,005,502,702.31
  5. Step 5: Solve for x
    x = 354,115,005,502,702.31/20,206,978.80
  6. Step 6: Final answer
    x = 17,524,391.40

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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.