Home / 3,128.44-4,312.24-2,119.84

Finding the Fourth Proportional to 3,128.44, 4,312.24 and 2,119.84

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Solution

The fourth proportional to 3,128.44, 4,312.24 and 2,119.84 is: 2,921.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.44 : 4,312.24 = 2,119.84 : x
  2. Step 2: Convert to fraction form
    3,128.44/4,312.24 = 2,119.84/x
  3. Step 3: Cross multiply
    3,128.44x = 4,312.24 × 2,119.84
  4. Step 4: Simplify right side
    3,128.44x = 9,141,226.68
  5. Step 5: Solve for x
    x = 9,141,226.68/3,128.44
  6. Step 6: Final answer
    x = 2,921.98

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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.