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Finding the Fourth Proportional to 19,161.64, 28,745.16 and 8,061.40

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Solution

The fourth proportional to 19,161.64, 28,745.16 and 8,061.40 is: 12,093.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,161.64 : 28,745.16 = 8,061.40 : x
  2. Step 2: Convert to fraction form
    19,161.64/28,745.16 = 8,061.40/x
  3. Step 3: Cross multiply
    19,161.64x = 28,745.16 × 8,061.40
  4. Step 4: Simplify right side
    19,161.64x = 231,726,232.82
  5. Step 5: Solve for x
    x = 231,726,232.82/19,161.64
  6. Step 6: Final answer
    x = 12,093.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.