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Finding the Fourth Proportional to 8,972,632.80, 13,440,286.80 and 7,479,640.80

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Solution

The fourth proportional to 8,972,632.80, 13,440,286.80 and 7,479,640.80 is: 11,203,904.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,972,632.80 : 13,440,286.80 = 7,479,640.80 : x
  2. Step 2: Convert to fraction form
    8,972,632.80/13,440,286.80 = 7,479,640.80/x
  3. Step 3: Cross multiply
    8,972,632.80x = 13,440,286.80 × 7,479,640.80
  4. Step 4: Simplify right side
    8,972,632.80x = 100,528,517,512,981.44
  5. Step 5: Solve for x
    x = 100,528,517,512,981.44/8,972,632.80
  6. Step 6: Final answer
    x = 11,203,904.11

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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.