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Finding the Fourth Proportional to 18,953.76, 26,161.60 and 10,997.76

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Solution

The fourth proportional to 18,953.76, 26,161.60 and 10,997.76 is: 15,180.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,953.76 : 26,161.60 = 10,997.76 : x
  2. Step 2: Convert to fraction form
    18,953.76/26,161.60 = 10,997.76/x
  3. Step 3: Cross multiply
    18,953.76x = 26,161.60 × 10,997.76
  4. Step 4: Simplify right side
    18,953.76x = 287,718,998.02
  5. Step 5: Solve for x
    x = 287,718,998.02/18,953.76
  6. Step 6: Final answer
    x = 15,180.05

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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.