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Finding the Fourth Proportional to 18,953.78, 26,152.20 and 10,994.99

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Solution

The fourth proportional to 18,953.78, 26,152.20 and 10,994.99 is: 15,170.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,953.78 : 26,152.20 = 10,994.99 : x
  2. Step 2: Convert to fraction form
    18,953.78/26,152.20 = 10,994.99/x
  3. Step 3: Cross multiply
    18,953.78x = 26,152.20 × 10,994.99
  4. Step 4: Simplify right side
    18,953.78x = 287,543,046.72
  5. Step 5: Solve for x
    x = 287,543,046.72/18,953.78
  6. Step 6: Final answer
    x = 15,170.75

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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.