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Finding the Fourth Proportional to 20,647.77, 30,976.24 and 8,169.04

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Solution

The fourth proportional to 20,647.77, 30,976.24 and 8,169.04 is: 12,255.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,647.77 : 30,976.24 = 8,169.04 : x
  2. Step 2: Convert to fraction form
    20,647.77/30,976.24 = 8,169.04/x
  3. Step 3: Cross multiply
    20,647.77x = 30,976.24 × 8,169.04
  4. Step 4: Simplify right side
    20,647.77x = 253,046,143.61
  5. Step 5: Solve for x
    x = 253,046,143.61/20,647.77
  6. Step 6: Final answer
    x = 12,255.37

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1.5x scale

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.