Home / 3,915.69-5,403.66-2,147.31

Finding the Fourth Proportional to 3,915.69, 5,403.66 and 2,147.31

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Solution

The fourth proportional to 3,915.69, 5,403.66 and 2,147.31 is: 2,963.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.69 : 5,403.66 = 2,147.31 : x
  2. Step 2: Convert to fraction form
    3,915.69/5,403.66 = 2,147.31/x
  3. Step 3: Cross multiply
    3,915.69x = 5,403.66 × 2,147.31
  4. Step 4: Simplify right side
    3,915.69x = 11,603,337.18
  5. Step 5: Solve for x
    x = 11,603,337.18/3,915.69
  6. Step 6: Final answer
    x = 2,963.29

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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.