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Finding the Fourth Proportional to 8,652.69, 11,940.28 and 5,115.22

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Solution

The fourth proportional to 8,652.69, 11,940.28 and 5,115.22 is: 7,058.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,652.69 : 11,940.28 = 5,115.22 : x
  2. Step 2: Convert to fraction form
    8,652.69/11,940.28 = 5,115.22/x
  3. Step 3: Cross multiply
    8,652.69x = 11,940.28 × 5,115.22
  4. Step 4: Simplify right side
    8,652.69x = 61,077,116.42
  5. Step 5: Solve for x
    x = 61,077,116.42/8,652.69
  6. Step 6: Final answer
    x = 7,058.74

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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.