Home / 7,815.68-11,716.32-2,620.16

Finding the Fourth Proportional to 7,815.68, 11,716.32 and 2,620.16

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Solution

The fourth proportional to 7,815.68, 11,716.32 and 2,620.16 is: 3,927.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.68 : 11,716.32 = 2,620.16 : x
  2. Step 2: Convert to fraction form
    7,815.68/11,716.32 = 2,620.16/x
  3. Step 3: Cross multiply
    7,815.68x = 11,716.32 × 2,620.16
  4. Step 4: Simplify right side
    7,815.68x = 30,698,633.01
  5. Step 5: Solve for x
    x = 30,698,633.01/7,815.68
  6. Step 6: Final answer
    x = 3,927.83

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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.