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Finding the Fourth Proportional to 8,907,949.80, 13,361,924.70 and 6,640,468.20

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Solution

The fourth proportional to 8,907,949.80, 13,361,924.70 and 6,640,468.20 is: 9,960,702.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,907,949.80 : 13,361,924.70 = 6,640,468.20 : x
  2. Step 2: Convert to fraction form
    8,907,949.80/13,361,924.70 = 6,640,468.20/x
  3. Step 3: Cross multiply
    8,907,949.80x = 13,361,924.70 × 6,640,468.20
  4. Step 4: Simplify right side
    8,907,949.80x = 88,729,436,061,144.53
  5. Step 5: Solve for x
    x = 88,729,436,061,144.53/8,907,949.80
  6. Step 6: Final answer
    x = 9,960,702.30

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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.