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Finding the Fourth Proportional to 3,893.94, 5,365.91 and 2,772.90

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Solution

The fourth proportional to 3,893.94, 5,365.91 and 2,772.90 is: 3,821.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,893.94 : 5,365.91 = 2,772.90 : x
  2. Step 2: Convert to fraction form
    3,893.94/5,365.91 = 2,772.90/x
  3. Step 3: Cross multiply
    3,893.94x = 5,365.91 × 2,772.90
  4. Step 4: Simplify right side
    3,893.94x = 14,879,138.77
  5. Step 5: Solve for x
    x = 14,879,138.77/3,893.94
  6. Step 6: Final answer
    x = 3,821.10

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1.5x scale

Why These Related Problems?

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