Home / 5,286-7,921.50-3,618.60

Finding the Fourth Proportional to 5,286, 7,921.50 and 3,618.60

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Solution

The fourth proportional to 5,286, 7,921.50 and 3,618.60 is: 5,422.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,286 : 7,921.50 = 3,618.60 : x
  2. Step 2: Convert to fraction form
    5,286/7,921.50 = 3,618.60/x
  3. Step 3: Cross multiply
    5,286x = 7,921.50 × 3,618.60
  4. Step 4: Simplify right side
    5,286x = 28,664,739.90
  5. Step 5: Solve for x
    x = 28,664,739.90/5,286
  6. Step 6: Final answer
    x = 5,422.77

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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.