Home / 5,308.80-7,951.05-3,121.80

Finding the Fourth Proportional to 5,308.80, 7,951.05 and 3,121.80

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Solution

The fourth proportional to 5,308.80, 7,951.05 and 3,121.80 is: 4,675.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,308.80 : 7,951.05 = 3,121.80 : x
  2. Step 2: Convert to fraction form
    5,308.80/7,951.05 = 3,121.80/x
  3. Step 3: Cross multiply
    5,308.80x = 7,951.05 × 3,121.80
  4. Step 4: Simplify right side
    5,308.80x = 24,821,587.89
  5. Step 5: Solve for x
    x = 24,821,587.89/5,308.80
  6. Step 6: Final answer
    x = 4,675.56

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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.