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Finding the Fourth Proportional to 18,647.26, 27,981.84 and 6,961.39

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Solution

The fourth proportional to 18,647.26, 27,981.84 and 6,961.39 is: 10,446.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,647.26 : 27,981.84 = 6,961.39 : x
  2. Step 2: Convert to fraction form
    18,647.26/27,981.84 = 6,961.39/x
  3. Step 3: Cross multiply
    18,647.26x = 27,981.84 × 6,961.39
  4. Step 4: Simplify right side
    18,647.26x = 194,792,501.16
  5. Step 5: Solve for x
    x = 194,792,501.16/18,647.26
  6. Step 6: Final answer
    x = 10,446.17

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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.