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Finding the Fourth Proportional to 20,608.98, 30,913.44 and 7,458.26

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Solution

The fourth proportional to 20,608.98, 30,913.44 and 7,458.26 is: 11,187.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,608.98 : 30,913.44 = 7,458.26 : x
  2. Step 2: Convert to fraction form
    20,608.98/30,913.44 = 7,458.26/x
  3. Step 3: Cross multiply
    20,608.98x = 30,913.44 × 7,458.26
  4. Step 4: Simplify right side
    20,608.98x = 230,560,473.01
  5. Step 5: Solve for x
    x = 230,560,473.01/20,608.98
  6. Step 6: Final answer
    x = 11,187.38

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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.