Home / 10,891.20-16,336.80-8,299.20

Finding the Fourth Proportional to 10,891.20, 16,336.80 and 8,299.20

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Solution

The fourth proportional to 10,891.20, 16,336.80 and 8,299.20 is: 12,448.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,891.20 : 16,336.80 = 8,299.20 : x
  2. Step 2: Convert to fraction form
    10,891.20/16,336.80 = 8,299.20/x
  3. Step 3: Cross multiply
    10,891.20x = 16,336.80 × 8,299.20
  4. Step 4: Simplify right side
    10,891.20x = 135,582,370.56
  5. Step 5: Solve for x
    x = 135,582,370.56/10,891.20
  6. Step 6: Final answer
    x = 12,448.80

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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.