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Finding the Fourth Proportional to 18,953.70, 26,156.10 and 10,996.50

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Solution

The fourth proportional to 18,953.70, 26,156.10 and 10,996.50 is: 15,175.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,953.70 : 26,156.10 = 10,996.50 : x
  2. Step 2: Convert to fraction form
    18,953.70/26,156.10 = 10,996.50/x
  3. Step 3: Cross multiply
    18,953.70x = 26,156.10 × 10,996.50
  4. Step 4: Simplify right side
    18,953.70x = 287,625,553.65
  5. Step 5: Solve for x
    x = 287,625,553.65/18,953.70
  6. Step 6: Final answer
    x = 15,175.17

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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.