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Finding the Fourth Proportional to 3,912.60, 5,835.93 and 3,640.44

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Solution

The fourth proportional to 3,912.60, 5,835.93 and 3,640.44 is: 5,429.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912.60 : 5,835.93 = 3,640.44 : x
  2. Step 2: Convert to fraction form
    3,912.60/5,835.93 = 3,640.44/x
  3. Step 3: Cross multiply
    3,912.60x = 5,835.93 × 3,640.44
  4. Step 4: Simplify right side
    3,912.60x = 21,245,353.01
  5. Step 5: Solve for x
    x = 21,245,353.01/3,912.60
  6. Step 6: Final answer
    x = 5,429.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.