Home / 7,690.87-11,532.66-3,989.40

Finding the Fourth Proportional to 7,690.87, 11,532.66 and 3,989.40

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Solution

The fourth proportional to 7,690.87, 11,532.66 and 3,989.40 is: 5,982.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,690.87 : 11,532.66 = 3,989.40 : x
  2. Step 2: Convert to fraction form
    7,690.87/11,532.66 = 3,989.40/x
  3. Step 3: Cross multiply
    7,690.87x = 11,532.66 × 3,989.40
  4. Step 4: Simplify right side
    7,690.87x = 46,008,393.80
  5. Step 5: Solve for x
    x = 46,008,393.80/7,690.87
  6. Step 6: Final answer
    x = 5,982.21

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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.