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Finding the Fourth Proportional to 11,480.70, 17,220.99 and 4,085.43

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Solution

The fourth proportional to 11,480.70, 17,220.99 and 4,085.43 is: 6,128.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,480.70 : 17,220.99 = 4,085.43 : x
  2. Step 2: Convert to fraction form
    11,480.70/17,220.99 = 4,085.43/x
  3. Step 3: Cross multiply
    11,480.70x = 17,220.99 × 4,085.43
  4. Step 4: Simplify right side
    11,480.70x = 70,355,149.18
  5. Step 5: Solve for x
    x = 70,355,149.18/11,480.70
  6. Step 6: Final answer
    x = 6,128.12

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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.