Home / 7,765.81-11,640.61-3,382.09

Finding the Fourth Proportional to 7,765.81, 11,640.61 and 3,382.09

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Solution

The fourth proportional to 7,765.81, 11,640.61 and 3,382.09 is: 5,069.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,765.81 : 11,640.61 = 3,382.09 : x
  2. Step 2: Convert to fraction form
    7,765.81/11,640.61 = 3,382.09/x
  3. Step 3: Cross multiply
    7,765.81x = 11,640.61 × 3,382.09
  4. Step 4: Simplify right side
    7,765.81x = 39,369,590.67
  5. Step 5: Solve for x
    x = 39,369,590.67/7,765.81
  6. Step 6: Final answer
    x = 5,069.61

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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.