Home / 3,940.69-5,438.07-2,148.18

Finding the Fourth Proportional to 3,940.69, 5,438.07 and 2,148.18

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Solution

The fourth proportional to 3,940.69, 5,438.07 and 2,148.18 is: 2,964.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.69 : 5,438.07 = 2,148.18 : x
  2. Step 2: Convert to fraction form
    3,940.69/5,438.07 = 2,148.18/x
  3. Step 3: Cross multiply
    3,940.69x = 5,438.07 × 2,148.18
  4. Step 4: Simplify right side
    3,940.69x = 11,681,953.21
  5. Step 5: Solve for x
    x = 11,681,953.21/3,940.69
  6. Step 6: Final answer
    x = 2,964.45

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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.