Home / 5,321.30-7,986.87-2,690.66

Finding the Fourth Proportional to 5,321.30, 7,986.87 and 2,690.66

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Solution

The fourth proportional to 5,321.30, 7,986.87 and 2,690.66 is: 4,038.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,321.30 : 7,986.87 = 2,690.66 : x
  2. Step 2: Convert to fraction form
    5,321.30/7,986.87 = 2,690.66/x
  3. Step 3: Cross multiply
    5,321.30x = 7,986.87 × 2,690.66
  4. Step 4: Simplify right side
    5,321.30x = 21,489,911.70
  5. Step 5: Solve for x
    x = 21,489,911.70/5,321.30
  6. Step 6: Final answer
    x = 4,038.47

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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.