Home / 10,640.91-15,971.21-5,379.62

Finding the Fourth Proportional to 10,640.91, 15,971.21 and 5,379.62

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Solution

The fourth proportional to 10,640.91, 15,971.21 and 5,379.62 is: 8,074.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,640.91 : 15,971.21 = 5,379.62 : x
  2. Step 2: Convert to fraction form
    10,640.91/15,971.21 = 5,379.62/x
  3. Step 3: Cross multiply
    10,640.91x = 15,971.21 × 5,379.62
  4. Step 4: Simplify right side
    10,640.91x = 85,919,040.74
  5. Step 5: Solve for x
    x = 85,919,040.74/10,640.91
  6. Step 6: Final answer
    x = 8,074.41

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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.