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Finding the Fourth Proportional to 8,651.44, 12,965.88 and 3,969.76

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Solution

The fourth proportional to 8,651.44, 12,965.88 and 3,969.76 is: 5,949.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,651.44 : 12,965.88 = 3,969.76 : x
  2. Step 2: Convert to fraction form
    8,651.44/12,965.88 = 3,969.76/x
  3. Step 3: Cross multiply
    8,651.44x = 12,965.88 × 3,969.76
  4. Step 4: Simplify right side
    8,651.44x = 51,471,431.79
  5. Step 5: Solve for x
    x = 51,471,431.79/8,651.44
  6. Step 6: Final answer
    x = 5,949.46

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1.5x scale

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.