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Finding the Fourth Proportional to 18,812.46, 25,961.34 and 12,843.98

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Solution

The fourth proportional to 18,812.46, 25,961.34 and 12,843.98 is: 17,724.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,812.46 : 25,961.34 = 12,843.98 : x
  2. Step 2: Convert to fraction form
    18,812.46/25,961.34 = 12,843.98/x
  3. Step 3: Cross multiply
    18,812.46x = 25,961.34 × 12,843.98
  4. Step 4: Simplify right side
    18,812.46x = 333,446,947.45
  5. Step 5: Solve for x
    x = 333,446,947.45/18,812.46
  6. Step 6: Final answer
    x = 17,724.79

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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.