Home / 3,938.60-5,906.28-3,118.88

Finding the Fourth Proportional to 3,938.60, 5,906.28 and 3,118.88

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Solution

The fourth proportional to 3,938.60, 5,906.28 and 3,118.88 is: 4,677.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.60 : 5,906.28 = 3,118.88 : x
  2. Step 2: Convert to fraction form
    3,938.60/5,906.28 = 3,118.88/x
  3. Step 3: Cross multiply
    3,938.60x = 5,906.28 × 3,118.88
  4. Step 4: Simplify right side
    3,938.60x = 18,420,978.57
  5. Step 5: Solve for x
    x = 18,420,978.57/3,938.60
  6. Step 6: Final answer
    x = 4,677.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.