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Finding the Fourth Proportional to 18,637,863.78, 27,947,442.18 and 10,859,291.88

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Solution

The fourth proportional to 18,637,863.78, 27,947,442.18 and 10,859,291.88 is: 16,283,488.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,637,863.78 : 27,947,442.18 = 10,859,291.88 : x
  2. Step 2: Convert to fraction form
    18,637,863.78/27,947,442.18 = 10,859,291.88/x
  3. Step 3: Cross multiply
    18,637,863.78x = 27,947,442.18 × 10,859,291.88
  4. Step 4: Simplify right side
    18,637,863.78x = 303,489,431,932,043.50
  5. Step 5: Solve for x
    x = 303,489,431,932,043.50/18,637,863.78
  6. Step 6: Final answer
    x = 16,283,488.04

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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.