Home / 7,091.66-9,786.84-3,947.78

Finding the Fourth Proportional to 7,091.66, 9,786.84 and 3,947.78

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Solution

The fourth proportional to 7,091.66, 9,786.84 and 3,947.78 is: 5,448.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,091.66 : 9,786.84 = 3,947.78 : x
  2. Step 2: Convert to fraction form
    7,091.66/9,786.84 = 3,947.78/x
  3. Step 3: Cross multiply
    7,091.66x = 9,786.84 × 3,947.78
  4. Step 4: Simplify right side
    7,091.66x = 38,636,291.22
  5. Step 5: Solve for x
    x = 38,636,291.22/7,091.66
  6. Step 6: Final answer
    x = 5,448.13

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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.