Home / 5,286.96-7,930.98-1,391.64

Finding the Fourth Proportional to 5,286.96, 7,930.98 and 1,391.64

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Solution

The fourth proportional to 5,286.96, 7,930.98 and 1,391.64 is: 2,087.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,286.96 : 7,930.98 = 1,391.64 : x
  2. Step 2: Convert to fraction form
    5,286.96/7,930.98 = 1,391.64/x
  3. Step 3: Cross multiply
    5,286.96x = 7,930.98 × 1,391.64
  4. Step 4: Simplify right side
    5,286.96x = 11,037,069.01
  5. Step 5: Solve for x
    x = 11,037,069.01/5,286.96
  6. Step 6: Final answer
    x = 2,087.60

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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.