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Finding the Fourth Proportional to 18,892,619.70, 26,079,859.88 and 12,701,257.18

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Solution

The fourth proportional to 18,892,619.70, 26,079,859.88 and 12,701,257.18 is: 17,533,143.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,892,619.70 : 26,079,859.88 = 12,701,257.18 : x
  2. Step 2: Convert to fraction form
    18,892,619.70/26,079,859.88 = 12,701,257.18/x
  3. Step 3: Cross multiply
    18,892,619.70x = 26,079,859.88 × 12,701,257.18
  4. Step 4: Simplify right side
    18,892,619.70x = 331,247,007,554,243.94
  5. Step 5: Solve for x
    x = 331,247,007,554,243.94/18,892,619.70
  6. Step 6: Final answer
    x = 17,533,143.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.