Home / 8,299.10-12,438.38-7,120.82

Finding the Fourth Proportional to 8,299.10, 12,438.38 and 7,120.82

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Solution

The fourth proportional to 8,299.10, 12,438.38 and 7,120.82 is: 10,672.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,299.10 : 12,438.38 = 7,120.82 : x
  2. Step 2: Convert to fraction form
    8,299.10/12,438.38 = 7,120.82/x
  3. Step 3: Cross multiply
    8,299.10x = 12,438.38 × 7,120.82
  4. Step 4: Simplify right side
    8,299.10x = 88,571,420.68
  5. Step 5: Solve for x
    x = 88,571,420.68/8,299.10
  6. Step 6: Final answer
    x = 10,672.42

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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.