Home / 3,168.36-4,371.90-2,120.76

Finding the Fourth Proportional to 3,168.36, 4,371.90 and 2,120.76

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Solution

The fourth proportional to 3,168.36, 4,371.90 and 2,120.76 is: 2,926.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,168.36 : 4,371.90 = 2,120.76 : x
  2. Step 2: Convert to fraction form
    3,168.36/4,371.90 = 2,120.76/x
  3. Step 3: Cross multiply
    3,168.36x = 4,371.90 × 2,120.76
  4. Step 4: Simplify right side
    3,168.36x = 9,271,750.64
  5. Step 5: Solve for x
    x = 9,271,750.64/3,168.36
  6. Step 6: Final answer
    x = 2,926.36

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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.