Home / 3,915.70-5,405.14-2,591.22

Finding the Fourth Proportional to 3,915.70, 5,405.14 and 2,591.22

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Solution

The fourth proportional to 3,915.70, 5,405.14 and 2,591.22 is: 3,576.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.70 : 5,405.14 = 2,591.22 : x
  2. Step 2: Convert to fraction form
    3,915.70/5,405.14 = 2,591.22/x
  3. Step 3: Cross multiply
    3,915.70x = 5,405.14 × 2,591.22
  4. Step 4: Simplify right side
    3,915.70x = 14,005,906.87
  5. Step 5: Solve for x
    x = 14,005,906.87/3,915.70
  6. Step 6: Final answer
    x = 3,576.86

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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.