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Finding the Fourth Proportional to 11,676.75, 16,113.92 and 7,485

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Solution

The fourth proportional to 11,676.75, 16,113.92 and 7,485 is: 10,329.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,676.75 : 16,113.92 = 7,485 : x
  2. Step 2: Convert to fraction form
    11,676.75/16,113.92 = 7,485/x
  3. Step 3: Cross multiply
    11,676.75x = 16,113.92 × 7,485
  4. Step 4: Simplify right side
    11,676.75x = 120,612,653.78
  5. Step 5: Solve for x
    x = 120,612,653.78/11,676.75
  6. Step 6: Final answer
    x = 10,329.30

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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.