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Finding the Fourth Proportional to 9,613.75, 13,267.38 and 5,422

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Solution

The fourth proportional to 9,613.75, 13,267.38 and 5,422 is: 7,482.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,613.75 : 13,267.38 = 5,422 : x
  2. Step 2: Convert to fraction form
    9,613.75/13,267.38 = 5,422/x
  3. Step 3: Cross multiply
    9,613.75x = 13,267.38 × 5,422
  4. Step 4: Simplify right side
    9,613.75x = 71,935,734.36
  5. Step 5: Solve for x
    x = 71,935,734.36/9,613.75
  6. Step 6: Final answer
    x = 7,482.59

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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.