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Finding the Fourth Proportional to 13,906.59, 19,192.49 and 7,939.18

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Solution

The fourth proportional to 13,906.59, 19,192.49 and 7,939.18 is: 10,956.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,906.59 : 19,192.49 = 7,939.18 : x
  2. Step 2: Convert to fraction form
    13,906.59/19,192.49 = 7,939.18/x
  3. Step 3: Cross multiply
    13,906.59x = 19,192.49 × 7,939.18
  4. Step 4: Simplify right side
    13,906.59x = 152,372,632.76
  5. Step 5: Solve for x
    x = 152,372,632.76/13,906.59
  6. Step 6: Final answer
    x = 10,956.87

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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.