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Finding the Fourth Proportional to 12,798,831.80, 19,198,247.70 and 8,494,159.70

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Solution

The fourth proportional to 12,798,831.80, 19,198,247.70 and 8,494,159.70 is: 12,741,239.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,798,831.80 : 19,198,247.70 = 8,494,159.70 : x
  2. Step 2: Convert to fraction form
    12,798,831.80/19,198,247.70 = 8,494,159.70/x
  3. Step 3: Cross multiply
    12,798,831.80x = 19,198,247.70 × 8,494,159.70
  4. Step 4: Simplify right side
    12,798,831.80x = 163,072,981,923,957.66
  5. Step 5: Solve for x
    x = 163,072,981,923,957.66/12,798,831.80
  6. Step 6: Final answer
    x = 12,741,239.55

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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.