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Finding the Fourth Proportional to 6,396.42, 8,809.41 and 5,511.90

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Solution

The fourth proportional to 6,396.42, 8,809.41 and 5,511.90 is: 7,591.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,396.42 : 8,809.41 = 5,511.90 : x
  2. Step 2: Convert to fraction form
    6,396.42/8,809.41 = 5,511.90/x
  3. Step 3: Cross multiply
    6,396.42x = 8,809.41 × 5,511.90
  4. Step 4: Simplify right side
    6,396.42x = 48,556,586.98
  5. Step 5: Solve for x
    x = 48,556,586.98/6,396.42
  6. Step 6: Final answer
    x = 7,591.21

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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.