Home / 5,121.60-7,666.20-2,775.75

Finding the Fourth Proportional to 5,121.60, 7,666.20 and 2,775.75

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Solution

The fourth proportional to 5,121.60, 7,666.20 and 2,775.75 is: 4,154.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.60 : 7,666.20 = 2,775.75 : x
  2. Step 2: Convert to fraction form
    5,121.60/7,666.20 = 2,775.75/x
  3. Step 3: Cross multiply
    5,121.60x = 7,666.20 × 2,775.75
  4. Step 4: Simplify right side
    5,121.60x = 21,279,454.65
  5. Step 5: Solve for x
    x = 21,279,454.65/5,121.60
  6. Step 6: Final answer
    x = 4,154.85

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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.