Home / 7,120.80-9,826.73-3,976.99

Finding the Fourth Proportional to 7,120.80, 9,826.73 and 3,976.99

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Solution

The fourth proportional to 7,120.80, 9,826.73 and 3,976.99 is: 5,488.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.80 : 9,826.73 = 3,976.99 : x
  2. Step 2: Convert to fraction form
    7,120.80/9,826.73 = 3,976.99/x
  3. Step 3: Cross multiply
    7,120.80x = 9,826.73 × 3,976.99
  4. Step 4: Simplify right side
    7,120.80x = 39,080,806.94
  5. Step 5: Solve for x
    x = 39,080,806.94/7,120.80
  6. Step 6: Final answer
    x = 5,488.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.