Home / 7,138.94-9,851.19-3,994.70

Finding the Fourth Proportional to 7,138.94, 9,851.19 and 3,994.70

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Solution

The fourth proportional to 7,138.94, 9,851.19 and 3,994.70 is: 5,512.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,138.94 : 9,851.19 = 3,994.70 : x
  2. Step 2: Convert to fraction form
    7,138.94/9,851.19 = 3,994.70/x
  3. Step 3: Cross multiply
    7,138.94x = 9,851.19 × 3,994.70
  4. Step 4: Simplify right side
    7,138.94x = 39,352,548.69
  5. Step 5: Solve for x
    x = 39,352,548.69/7,138.94
  6. Step 6: Final answer
    x = 5,512.38

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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.