Home / 7,980.12-11,961.78-3,817.56

Finding the Fourth Proportional to 7,980.12, 11,961.78 and 3,817.56

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Solution

The fourth proportional to 7,980.12, 11,961.78 and 3,817.56 is: 5,722.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,980.12 : 11,961.78 = 3,817.56 : x
  2. Step 2: Convert to fraction form
    7,980.12/11,961.78 = 3,817.56/x
  3. Step 3: Cross multiply
    7,980.12x = 11,961.78 × 3,817.56
  4. Step 4: Simplify right side
    7,980.12x = 45,664,812.86
  5. Step 5: Solve for x
    x = 45,664,812.86/7,980.12
  6. Step 6: Final answer
    x = 5,722.32

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1.5x scale

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.