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Finding the Fourth Proportional to 18,709.92, 25,808.22 and 12,744.27

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Solution

The fourth proportional to 18,709.92, 25,808.22 and 12,744.27 is: 17,579.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,709.92 : 25,808.22 = 12,744.27 : x
  2. Step 2: Convert to fraction form
    18,709.92/25,808.22 = 12,744.27/x
  3. Step 3: Cross multiply
    18,709.92x = 25,808.22 × 12,744.27
  4. Step 4: Simplify right side
    18,709.92x = 328,906,923.90
  5. Step 5: Solve for x
    x = 328,906,923.90/18,709.92
  6. Step 6: Final answer
    x = 17,579.28

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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.