Home / 9,211.21-12,708.71-5,231.77

Finding the Fourth Proportional to 9,211.21, 12,708.71 and 5,231.77

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Solution

The fourth proportional to 9,211.21, 12,708.71 and 5,231.77 is: 7,218.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,211.21 : 12,708.71 = 5,231.77 : x
  2. Step 2: Convert to fraction form
    9,211.21/12,708.71 = 5,231.77/x
  3. Step 3: Cross multiply
    9,211.21x = 12,708.71 × 5,231.77
  4. Step 4: Simplify right side
    9,211.21x = 66,489,021.56
  5. Step 5: Solve for x
    x = 66,489,021.56/9,211.21
  6. Step 6: Final answer
    x = 7,218.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.