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Finding the Fourth Proportional to 8,691,843.30, 13,042,430.55 and 3,643,664.10

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Solution

The fourth proportional to 8,691,843.30, 13,042,430.55 and 3,643,664.10 is: 5,467,451.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691,843.30 : 13,042,430.55 = 3,643,664.10 : x
  2. Step 2: Convert to fraction form
    8,691,843.30/13,042,430.55 = 3,643,664.10/x
  3. Step 3: Cross multiply
    8,691,843.30x = 13,042,430.55 × 3,643,664.10
  4. Step 4: Simplify right side
    8,691,843.30x = 47,522,235,971,778.26
  5. Step 5: Solve for x
    x = 47,522,235,971,778.26/8,691,843.30
  6. Step 6: Final answer
    x = 5,467,451.99

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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.