Home / 4,764.60-7,138.80-3,938.40

Finding the Fourth Proportional to 4,764.60, 7,138.80 and 3,938.40

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Solution

The fourth proportional to 4,764.60, 7,138.80 and 3,938.40 is: 5,900.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,764.60 : 7,138.80 = 3,938.40 : x
  2. Step 2: Convert to fraction form
    4,764.60/7,138.80 = 3,938.40/x
  3. Step 3: Cross multiply
    4,764.60x = 7,138.80 × 3,938.40
  4. Step 4: Simplify right side
    4,764.60x = 28,115,449.92
  5. Step 5: Solve for x
    x = 28,115,449.92/4,764.60
  6. Step 6: Final answer
    x = 5,900.90

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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.