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Finding the Fourth Proportional to 28,494.48, 39,322.31 and 15,919.23

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Solution

The fourth proportional to 28,494.48, 39,322.31 and 15,919.23 is: 21,968.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,494.48 : 39,322.31 = 15,919.23 : x
  2. Step 2: Convert to fraction form
    28,494.48/39,322.31 = 15,919.23/x
  3. Step 3: Cross multiply
    28,494.48x = 39,322.31 × 15,919.23
  4. Step 4: Simplify right side
    28,494.48x = 625,981,054.43
  5. Step 5: Solve for x
    x = 625,981,054.43/28,494.48
  6. Step 6: Final answer
    x = 21,968.50

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.