Home / 5,115.60-7,657.20-2,769.75

Finding the Fourth Proportional to 5,115.60, 7,657.20 and 2,769.75

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Solution

The fourth proportional to 5,115.60, 7,657.20 and 2,769.75 is: 4,145.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.60 : 7,657.20 = 2,769.75 : x
  2. Step 2: Convert to fraction form
    5,115.60/7,657.20 = 2,769.75/x
  3. Step 3: Cross multiply
    5,115.60x = 7,657.20 × 2,769.75
  4. Step 4: Simplify right side
    5,115.60x = 21,208,529.70
  5. Step 5: Solve for x
    x = 21,208,529.70/5,115.60
  6. Step 6: Final answer
    x = 4,145.85

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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.