Home / 3,915.86-5,403.94-2,147.35

Finding the Fourth Proportional to 3,915.86, 5,403.94 and 2,147.35

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Solution

The fourth proportional to 3,915.86, 5,403.94 and 2,147.35 is: 2,963.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.86 : 5,403.94 = 2,147.35 : x
  2. Step 2: Convert to fraction form
    3,915.86/5,403.94 = 2,147.35/x
  3. Step 3: Cross multiply
    3,915.86x = 5,403.94 × 2,147.35
  4. Step 4: Simplify right side
    3,915.86x = 11,604,146.49
  5. Step 5: Solve for x
    x = 11,604,146.49/3,915.86
  6. Step 6: Final answer
    x = 2,963.37

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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.