Home / 3,431.84-5,137.68-2,129.12

Finding the Fourth Proportional to 3,431.84, 5,137.68 and 2,129.12

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Solution

The fourth proportional to 3,431.84, 5,137.68 and 2,129.12 is: 3,187.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,431.84 : 5,137.68 = 2,129.12 : x
  2. Step 2: Convert to fraction form
    3,431.84/5,137.68 = 2,129.12/x
  3. Step 3: Cross multiply
    3,431.84x = 5,137.68 × 2,129.12
  4. Step 4: Simplify right side
    3,431.84x = 10,938,737.24
  5. Step 5: Solve for x
    x = 10,938,737.24/3,431.84
  6. Step 6: Final answer
    x = 3,187.43

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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.