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Finding the Fourth Proportional to 3,969.06, 5,947.74 and 2,211.64

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Solution

The fourth proportional to 3,969.06, 5,947.74 and 2,211.64 is: 3,314.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,969.06 : 5,947.74 = 2,211.64 : x
  2. Step 2: Convert to fraction form
    3,969.06/5,947.74 = 2,211.64/x
  3. Step 3: Cross multiply
    3,969.06x = 5,947.74 × 2,211.64
  4. Step 4: Simplify right side
    3,969.06x = 13,154,259.69
  5. Step 5: Solve for x
    x = 13,154,259.69/3,969.06
  6. Step 6: Final answer
    x = 3,314.20

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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.