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Finding the Fourth Proportional to 18,647.70, 27,976.37 and 6,961.02

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Solution

The fourth proportional to 18,647.70, 27,976.37 and 6,961.02 is: 10,443.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,647.70 : 27,976.37 = 6,961.02 : x
  2. Step 2: Convert to fraction form
    18,647.70/27,976.37 = 6,961.02/x
  3. Step 3: Cross multiply
    18,647.70x = 27,976.37 × 6,961.02
  4. Step 4: Simplify right side
    18,647.70x = 194,744,071.10
  5. Step 5: Solve for x
    x = 194,744,071.10/18,647.70
  6. Step 6: Final answer
    x = 10,443.33

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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.