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Finding the Fourth Proportional to 19,489.56, 26,893.99 and 10,993.78

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Solution

The fourth proportional to 19,489.56, 26,893.99 and 10,993.78 is: 15,170.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,489.56 : 26,893.99 = 10,993.78 : x
  2. Step 2: Convert to fraction form
    19,489.56/26,893.99 = 10,993.78/x
  3. Step 3: Cross multiply
    19,489.56x = 26,893.99 × 10,993.78
  4. Step 4: Simplify right side
    19,489.56x = 295,666,459.08
  5. Step 5: Solve for x
    x = 295,666,459.08/19,489.56
  6. Step 6: Final answer
    x = 15,170.50

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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.