Home / 7,137.72-9,850.40-3,993.28

Finding the Fourth Proportional to 7,137.72, 9,850.40 and 3,993.28

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Solution

The fourth proportional to 7,137.72, 9,850.40 and 3,993.28 is: 5,510.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,137.72 : 9,850.40 = 3,993.28 : x
  2. Step 2: Convert to fraction form
    7,137.72/9,850.40 = 3,993.28/x
  3. Step 3: Cross multiply
    7,137.72x = 9,850.40 × 3,993.28
  4. Step 4: Simplify right side
    7,137.72x = 39,335,405.31
  5. Step 5: Solve for x
    x = 39,335,405.31/7,137.72
  6. Step 6: Final answer
    x = 5,510.92

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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.