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Finding the Fourth Proportional to 8,309.10, 11,449.20 and 5,651.88

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Solution

The fourth proportional to 8,309.10, 11,449.20 and 5,651.88 is: 7,787.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,309.10 : 11,449.20 = 5,651.88 : x
  2. Step 2: Convert to fraction form
    8,309.10/11,449.20 = 5,651.88/x
  3. Step 3: Cross multiply
    8,309.10x = 11,449.20 × 5,651.88
  4. Step 4: Simplify right side
    8,309.10x = 64,709,504.50
  5. Step 5: Solve for x
    x = 64,709,504.50/8,309.10
  6. Step 6: Final answer
    x = 7,787.79

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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.