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Finding the Fourth Proportional to 8,653,869, 12,978,042.86 and 2,972,723.40

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Solution

The fourth proportional to 8,653,869, 12,978,042.86 and 2,972,723.40 is: 4,458,136.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,653,869 : 12,978,042.86 = 2,972,723.40 : x
  2. Step 2: Convert to fraction form
    8,653,869/12,978,042.86 = 2,972,723.40/x
  3. Step 3: Cross multiply
    8,653,869x = 12,978,042.86 × 2,972,723.40
  4. Step 4: Simplify right side
    8,653,869x = 38,580,131,696,124.92
  5. Step 5: Solve for x
    x = 38,580,131,696,124.92/8,653,869
  6. Step 6: Final answer
    x = 4,458,136.78

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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.