Home / 3,915.50-5,403.13-2,146.75

Finding the Fourth Proportional to 3,915.50, 5,403.13 and 2,146.75

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Solution

The fourth proportional to 3,915.50, 5,403.13 and 2,146.75 is: 2,962.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.50 : 5,403.13 = 2,146.75 : x
  2. Step 2: Convert to fraction form
    3,915.50/5,403.13 = 2,146.75/x
  3. Step 3: Cross multiply
    3,915.50x = 5,403.13 × 2,146.75
  4. Step 4: Simplify right side
    3,915.50x = 11,599,150.45
  5. Step 5: Solve for x
    x = 11,599,150.45/3,915.50
  6. Step 6: Final answer
    x = 2,962.37

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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.