Home / 11,339.20-16,989.60-9,380.80

Finding the Fourth Proportional to 11,339.20, 16,989.60 and 9,380.80

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Solution

The fourth proportional to 11,339.20, 16,989.60 and 9,380.80 is: 14,055.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,339.20 : 16,989.60 = 9,380.80 : x
  2. Step 2: Convert to fraction form
    11,339.20/16,989.60 = 9,380.80/x
  3. Step 3: Cross multiply
    11,339.20x = 16,989.60 × 9,380.80
  4. Step 4: Simplify right side
    11,339.20x = 159,376,039.68
  5. Step 5: Solve for x
    x = 159,376,039.68/11,339.20
  6. Step 6: Final answer
    x = 14,055.32

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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.