Home / 3,951.05-5,453.43-2,890.35

Finding the Fourth Proportional to 3,951.05, 5,453.43 and 2,890.35

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Solution

The fourth proportional to 3,951.05, 5,453.43 and 2,890.35 is: 3,989.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,951.05 : 5,453.43 = 2,890.35 : x
  2. Step 2: Convert to fraction form
    3,951.05/5,453.43 = 2,890.35/x
  3. Step 3: Cross multiply
    3,951.05x = 5,453.43 × 2,890.35
  4. Step 4: Simplify right side
    3,951.05x = 15,762,310.56
  5. Step 5: Solve for x
    x = 15,762,310.56/3,951.05
  6. Step 6: Final answer
    x = 3,989.40

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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.