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Finding the Fourth Proportional to 3,986.57, 5,980.93 and 3,550.81

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Solution

The fourth proportional to 3,986.57, 5,980.93 and 3,550.81 is: 5,327.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986.57 : 5,980.93 = 3,550.81 : x
  2. Step 2: Convert to fraction form
    3,986.57/5,980.93 = 3,550.81/x
  3. Step 3: Cross multiply
    3,986.57x = 5,980.93 × 3,550.81
  4. Step 4: Simplify right side
    3,986.57x = 21,237,122.22
  5. Step 5: Solve for x
    x = 21,237,122.22/3,986.57
  6. Step 6: Final answer
    x = 5,327.16

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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.