Home / 3,428.46-5,138.64-2,813.40

Finding the Fourth Proportional to 3,428.46, 5,138.64 and 2,813.40

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Solution

The fourth proportional to 3,428.46, 5,138.64 and 2,813.40 is: 4,216.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,428.46 : 5,138.64 = 2,813.40 : x
  2. Step 2: Convert to fraction form
    3,428.46/5,138.64 = 2,813.40/x
  3. Step 3: Cross multiply
    3,428.46x = 5,138.64 × 2,813.40
  4. Step 4: Simplify right side
    3,428.46x = 14,457,049.78
  5. Step 5: Solve for x
    x = 14,457,049.78/3,428.46
  6. Step 6: Final answer
    x = 4,216.78

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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.