Home / 3,915.45-5,403.32-2,147.09

Finding the Fourth Proportional to 3,915.45, 5,403.32 and 2,147.09

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Solution

The fourth proportional to 3,915.45, 5,403.32 and 2,147.09 is: 2,962.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.45 : 5,403.32 = 2,147.09 : x
  2. Step 2: Convert to fraction form
    3,915.45/5,403.32 = 2,147.09/x
  3. Step 3: Cross multiply
    3,915.45x = 5,403.32 × 2,147.09
  4. Step 4: Simplify right side
    3,915.45x = 11,601,376.59
  5. Step 5: Solve for x
    x = 11,601,376.59/3,915.45
  6. Step 6: Final answer
    x = 2,962.97

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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.