Home / 11,185.20-16,783.20-7,891.20

Finding the Fourth Proportional to 11,185.20, 16,783.20 and 7,891.20

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Solution

The fourth proportional to 11,185.20, 16,783.20 and 7,891.20 is: 11,840.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,185.20 : 16,783.20 = 7,891.20 : x
  2. Step 2: Convert to fraction form
    11,185.20/16,783.20 = 7,891.20/x
  3. Step 3: Cross multiply
    11,185.20x = 16,783.20 × 7,891.20
  4. Step 4: Simplify right side
    11,185.20x = 132,439,587.84
  5. Step 5: Solve for x
    x = 132,439,587.84/11,185.20
  6. Step 6: Final answer
    x = 11,840.61

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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.