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Finding the Fourth Proportional to 17,806.72, 26,702.79 and 7,939.25

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Solution

The fourth proportional to 17,806.72, 26,702.79 and 7,939.25 is: 11,905.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,806.72 : 26,702.79 = 7,939.25 : x
  2. Step 2: Convert to fraction form
    17,806.72/26,702.79 = 7,939.25/x
  3. Step 3: Cross multiply
    17,806.72x = 26,702.79 × 7,939.25
  4. Step 4: Simplify right side
    17,806.72x = 212,000,125.51
  5. Step 5: Solve for x
    x = 212,000,125.51/17,806.72
  6. Step 6: Final answer
    x = 11,905.62

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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.