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Finding the Fourth Proportional to 13,631,416.80, 20,429,758.80 and 7,244,728.80

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Solution

The fourth proportional to 13,631,416.80, 20,429,758.80 and 7,244,728.80 is: 10,857,863.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,631,416.80 : 20,429,758.80 = 7,244,728.80 : x
  2. Step 2: Convert to fraction form
    13,631,416.80/20,429,758.80 = 7,244,728.80/x
  3. Step 3: Cross multiply
    13,631,416.80x = 20,429,758.80 × 7,244,728.80
  4. Step 4: Simplify right side
    13,631,416.80x = 148,008,061,955,413.44
  5. Step 5: Solve for x
    x = 148,008,061,955,413.44/13,631,416.80
  6. Step 6: Final answer
    x = 10,857,863.43

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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.