Home / 8,081.10-12,121.65-6,112.80

Finding the Fourth Proportional to 8,081.10, 12,121.65 and 6,112.80

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Solution

The fourth proportional to 8,081.10, 12,121.65 and 6,112.80 is: 9,169.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,081.10 : 12,121.65 = 6,112.80 : x
  2. Step 2: Convert to fraction form
    8,081.10/12,121.65 = 6,112.80/x
  3. Step 3: Cross multiply
    8,081.10x = 12,121.65 × 6,112.80
  4. Step 4: Simplify right side
    8,081.10x = 74,097,222.12
  5. Step 5: Solve for x
    x = 74,097,222.12/8,081.10
  6. Step 6: Final answer
    x = 9,169.20

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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.