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Finding the Fourth Proportional to 10,992,943.70, 16,489,415.55 and 8,264,879.90

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Solution

The fourth proportional to 10,992,943.70, 16,489,415.55 and 8,264,879.90 is: 12,397,319.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,992,943.70 : 16,489,415.55 = 8,264,879.90 : x
  2. Step 2: Convert to fraction form
    10,992,943.70/16,489,415.55 = 8,264,879.90/x
  3. Step 3: Cross multiply
    10,992,943.70x = 16,489,415.55 × 8,264,879.90
  4. Step 4: Simplify right side
    10,992,943.70x = 136,283,039,141,942.45
  5. Step 5: Solve for x
    x = 136,283,039,141,942.45/10,992,943.70
  6. Step 6: Final answer
    x = 12,397,319.85

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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.