Home / 3,936.88-5,430-3,438.46

Finding the Fourth Proportional to 3,936.88, 5,430 and 3,438.46

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Solution

The fourth proportional to 3,936.88, 5,430 and 3,438.46 is: 4,742.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936.88 : 5,430 = 3,438.46 : x
  2. Step 2: Convert to fraction form
    3,936.88/5,430 = 3,438.46/x
  3. Step 3: Cross multiply
    3,936.88x = 5,430 × 3,438.46
  4. Step 4: Simplify right side
    3,936.88x = 18,670,837.80
  5. Step 5: Solve for x
    x = 18,670,837.80/3,936.88
  6. Step 6: Final answer
    x = 4,742.55

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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.