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Finding the Fourth Proportional to 17,183.80, 25,783.80 and 12,809.80

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Solution

The fourth proportional to 17,183.80, 25,783.80 and 12,809.80 is: 19,220.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,183.80 : 25,783.80 = 12,809.80 : x
  2. Step 2: Convert to fraction form
    17,183.80/25,783.80 = 12,809.80/x
  3. Step 3: Cross multiply
    17,183.80x = 25,783.80 × 12,809.80
  4. Step 4: Simplify right side
    17,183.80x = 330,285,321.24
  5. Step 5: Solve for x
    x = 330,285,321.24/17,183.80
  6. Step 6: Final answer
    x = 19,220.74

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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.