Home / 6,918.80-10,378.12-3,218.97

Finding the Fourth Proportional to 6,918.80, 10,378.12 and 3,218.97

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Solution

The fourth proportional to 6,918.80, 10,378.12 and 3,218.97 is: 4,828.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,918.80 : 10,378.12 = 3,218.97 : x
  2. Step 2: Convert to fraction form
    6,918.80/10,378.12 = 3,218.97/x
  3. Step 3: Cross multiply
    6,918.80x = 10,378.12 × 3,218.97
  4. Step 4: Simplify right side
    6,918.80x = 33,406,856.94
  5. Step 5: Solve for x
    x = 33,406,856.94/6,918.80
  6. Step 6: Final answer
    x = 4,828.42

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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.