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Finding the Fourth Proportional to 39,408.94, 54,385.53 and 22,415.63

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Solution

The fourth proportional to 39,408.94, 54,385.53 and 22,415.63 is: 30,934.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,408.94 : 54,385.53 = 22,415.63 : x
  2. Step 2: Convert to fraction form
    39,408.94/54,385.53 = 22,415.63/x
  3. Step 3: Cross multiply
    39,408.94x = 54,385.53 × 22,415.63
  4. Step 4: Simplify right side
    39,408.94x = 1,219,085,917.83
  5. Step 5: Solve for x
    x = 1,219,085,917.83/39,408.94
  6. Step 6: Final answer
    x = 30,934.25

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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.