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Finding the Fourth Proportional to 36,016.60, 54,020.04 and 12,640

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Solution

The fourth proportional to 36,016.60, 54,020.04 and 12,640 is: 18,958.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,016.60 : 54,020.04 = 12,640 : x
  2. Step 2: Convert to fraction form
    36,016.60/54,020.04 = 12,640/x
  3. Step 3: Cross multiply
    36,016.60x = 54,020.04 × 12,640
  4. Step 4: Simplify right side
    36,016.60x = 682,813,305.60
  5. Step 5: Solve for x
    x = 682,813,305.60/36,016.60
  6. Step 6: Final answer
    x = 18,958.29

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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.