Home / 3,181.97-4,392.63-2,121.50

Finding the Fourth Proportional to 3,181.97, 4,392.63 and 2,121.50

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Solution

The fourth proportional to 3,181.97, 4,392.63 and 2,121.50 is: 2,928.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,181.97 : 4,392.63 = 2,121.50 : x
  2. Step 2: Convert to fraction form
    3,181.97/4,392.63 = 2,121.50/x
  3. Step 3: Cross multiply
    3,181.97x = 4,392.63 × 2,121.50
  4. Step 4: Simplify right side
    3,181.97x = 9,318,942.58
  5. Step 5: Solve for x
    x = 9,318,942.58/3,181.97
  6. Step 6: Final answer
    x = 2,928.68

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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.