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Finding the Fourth Proportional to 12,361.05, 18,536.58 and 7,674.12

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Solution

The fourth proportional to 12,361.05, 18,536.58 and 7,674.12 is: 11,508.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,361.05 : 18,536.58 = 7,674.12 : x
  2. Step 2: Convert to fraction form
    12,361.05/18,536.58 = 7,674.12/x
  3. Step 3: Cross multiply
    12,361.05x = 18,536.58 × 7,674.12
  4. Step 4: Simplify right side
    12,361.05x = 142,251,939.31
  5. Step 5: Solve for x
    x = 142,251,939.31/12,361.05
  6. Step 6: Final answer
    x = 11,508.08

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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.