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Finding the Fourth Proportional to 8,979,893.69, 12,392,264.52 and 5,112,414.77

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Solution

The fourth proportional to 8,979,893.69, 12,392,264.52 and 5,112,414.77 is: 7,055,138.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979,893.69 : 12,392,264.52 = 5,112,414.77 : x
  2. Step 2: Convert to fraction form
    8,979,893.69/12,392,264.52 = 5,112,414.77/x
  3. Step 3: Cross multiply
    8,979,893.69x = 12,392,264.52 × 5,112,414.77
  4. Step 4: Simplify right side
    8,979,893.69x = 63,354,396,103,833.63
  5. Step 5: Solve for x
    x = 63,354,396,103,833.63/8,979,893.69
  6. Step 6: Final answer
    x = 7,055,138.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.