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Finding the Fourth Proportional to 15,879.26, 21,914.67 and 8,805.53

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Solution

The fourth proportional to 15,879.26, 21,914.67 and 8,805.53 is: 12,152.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,879.26 : 21,914.67 = 8,805.53 : x
  2. Step 2: Convert to fraction form
    15,879.26/21,914.67 = 8,805.53/x
  3. Step 3: Cross multiply
    15,879.26x = 21,914.67 × 8,805.53
  4. Step 4: Simplify right side
    15,879.26x = 192,970,174.55
  5. Step 5: Solve for x
    x = 192,970,174.55/15,879.26
  6. Step 6: Final answer
    x = 12,152.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.