Home / 8,211.27-12,305.55-7,112.91

Finding the Fourth Proportional to 8,211.27, 12,305.55 and 7,112.91

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Solution

The fourth proportional to 8,211.27, 12,305.55 and 7,112.91 is: 10,659.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,211.27 : 12,305.55 = 7,112.91 : x
  2. Step 2: Convert to fraction form
    8,211.27/12,305.55 = 7,112.91/x
  3. Step 3: Cross multiply
    8,211.27x = 12,305.55 × 7,112.91
  4. Step 4: Simplify right side
    8,211.27x = 87,528,269.65
  5. Step 5: Solve for x
    x = 87,528,269.65/8,211.27
  6. Step 6: Final answer
    x = 10,659.53

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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.