Home / 3,915.33-5,403.12-2,146.90

Finding the Fourth Proportional to 3,915.33, 5,403.12 and 2,146.90

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Solution

The fourth proportional to 3,915.33, 5,403.12 and 2,146.90 is: 2,962.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.33 : 5,403.12 = 2,146.90 : x
  2. Step 2: Convert to fraction form
    3,915.33/5,403.12 = 2,146.90/x
  3. Step 3: Cross multiply
    3,915.33x = 5,403.12 × 2,146.90
  4. Step 4: Simplify right side
    3,915.33x = 11,599,958.33
  5. Step 5: Solve for x
    x = 11,599,958.33/3,915.33
  6. Step 6: Final answer
    x = 2,962.70

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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.