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Finding the Fourth Proportional to 8,625,728.40, 12,922,846.20 and 5,255,998.80

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Solution

The fourth proportional to 8,625,728.40, 12,922,846.20 and 5,255,998.80 is: 7,874,403.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,625,728.40 : 12,922,846.20 = 5,255,998.80 : x
  2. Step 2: Convert to fraction form
    8,625,728.40/12,922,846.20 = 5,255,998.80/x
  3. Step 3: Cross multiply
    8,625,728.40x = 12,922,846.20 × 5,255,998.80
  4. Step 4: Simplify right side
    8,625,728.40x = 67,922,464,119,784.55
  5. Step 5: Solve for x
    x = 67,922,464,119,784.55/8,625,728.40
  6. Step 6: Final answer
    x = 7,874,403.29

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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.