Home / 3,951.40-5,921.70-2,631.40

Finding the Fourth Proportional to 3,951.40, 5,921.70 and 2,631.40

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Solution

The fourth proportional to 3,951.40, 5,921.70 and 2,631.40 is: 3,943.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,951.40 : 5,921.70 = 2,631.40 : x
  2. Step 2: Convert to fraction form
    3,951.40/5,921.70 = 2,631.40/x
  3. Step 3: Cross multiply
    3,951.40x = 5,921.70 × 2,631.40
  4. Step 4: Simplify right side
    3,951.40x = 15,582,361.38
  5. Step 5: Solve for x
    x = 15,582,361.38/3,951.40
  6. Step 6: Final answer
    x = 3,943.50

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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.