Home / 8,431.37-12,653.40-3,171.57

Finding the Fourth Proportional to 8,431.37, 12,653.40 and 3,171.57

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Solution

The fourth proportional to 8,431.37, 12,653.40 and 3,171.57 is: 4,759.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,431.37 : 12,653.40 = 3,171.57 : x
  2. Step 2: Convert to fraction form
    8,431.37/12,653.40 = 3,171.57/x
  3. Step 3: Cross multiply
    8,431.37x = 12,653.40 × 3,171.57
  4. Step 4: Simplify right side
    8,431.37x = 40,131,161.62
  5. Step 5: Solve for x
    x = 40,131,161.62/8,431.37
  6. Step 6: Final answer
    x = 4,759.74

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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.