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Finding the Fourth Proportional to 36,647.51, 54,979.34 and 20,859.98

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Solution

The fourth proportional to 36,647.51, 54,979.34 and 20,859.98 is: 31,294.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,647.51 : 54,979.34 = 20,859.98 : x
  2. Step 2: Convert to fraction form
    36,647.51/54,979.34 = 20,859.98/x
  3. Step 3: Cross multiply
    36,647.51x = 54,979.34 × 20,859.98
  4. Step 4: Simplify right side
    36,647.51x = 1,146,867,553.62
  5. Step 5: Solve for x
    x = 1,146,867,553.62/36,647.51
  6. Step 6: Final answer
    x = 31,294.55

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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.