Home / 3,438.30-4,745.15-2,112.47

Finding the Fourth Proportional to 3,438.30, 4,745.15 and 2,112.47

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Solution

The fourth proportional to 3,438.30, 4,745.15 and 2,112.47 is: 2,915.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,438.30 : 4,745.15 = 2,112.47 : x
  2. Step 2: Convert to fraction form
    3,438.30/4,745.15 = 2,112.47/x
  3. Step 3: Cross multiply
    3,438.30x = 4,745.15 × 2,112.47
  4. Step 4: Simplify right side
    3,438.30x = 10,023,987.02
  5. Step 5: Solve for x
    x = 10,023,987.02/3,438.30
  6. Step 6: Final answer
    x = 2,915.39

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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.