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Finding the Fourth Proportional to 12,274.92, 18,415.44 and 3,509.91

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Solution

The fourth proportional to 12,274.92, 18,415.44 and 3,509.91 is: 5,265.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,274.92 : 18,415.44 = 3,509.91 : x
  2. Step 2: Convert to fraction form
    12,274.92/18,415.44 = 3,509.91/x
  3. Step 3: Cross multiply
    12,274.92x = 18,415.44 × 3,509.91
  4. Step 4: Simplify right side
    12,274.92x = 64,636,537.01
  5. Step 5: Solve for x
    x = 64,636,537.01/12,274.92
  6. Step 6: Final answer
    x = 5,265.74

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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.