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Finding the Fourth Proportional to 13,299.21, 19,912.82 and 8,907.21

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Solution

The fourth proportional to 13,299.21, 19,912.82 and 8,907.21 is: 13,336.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,299.21 : 19,912.82 = 8,907.21 : x
  2. Step 2: Convert to fraction form
    13,299.21/19,912.82 = 8,907.21/x
  3. Step 3: Cross multiply
    13,299.21x = 19,912.82 × 8,907.21
  4. Step 4: Simplify right side
    13,299.21x = 177,367,624.90
  5. Step 5: Solve for x
    x = 177,367,624.90/13,299.21
  6. Step 6: Final answer
    x = 13,336.70

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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.