Home / 20,728,346.10-31,080,855.15-7,949,267.70

Finding the Fourth Proportional to 20,728,346.10, 31,080,855.15 and 7,949,267.70

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Solution

The fourth proportional to 20,728,346.10, 31,080,855.15 and 7,949,267.70 is: 11,919,428.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728,346.10 : 31,080,855.15 = 7,949,267.70 : x
  2. Step 2: Convert to fraction form
    20,728,346.10/31,080,855.15 = 7,949,267.70/x
  3. Step 3: Cross multiply
    20,728,346.10x = 31,080,855.15 × 7,949,267.70
  4. Step 4: Simplify right side
    20,728,346.10x = 247,070,037,932,273.66
  5. Step 5: Solve for x
    x = 247,070,037,932,273.66/20,728,346.10
  6. Step 6: Final answer
    x = 11,919,428.44

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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.