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Finding the Fourth Proportional to 6,767.68, 9,339.60 and 3,972.64

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Solution

The fourth proportional to 6,767.68, 9,339.60 and 3,972.64 is: 5,482.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,767.68 : 9,339.60 = 3,972.64 : x
  2. Step 2: Convert to fraction form
    6,767.68/9,339.60 = 3,972.64/x
  3. Step 3: Cross multiply
    6,767.68x = 9,339.60 × 3,972.64
  4. Step 4: Simplify right side
    6,767.68x = 37,102,868.54
  5. Step 5: Solve for x
    x = 37,102,868.54/6,767.68
  6. Step 6: Final answer
    x = 5,482.36

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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.