Home / 7,135.75-9,847.34-3,992.68

Finding the Fourth Proportional to 7,135.75, 9,847.34 and 3,992.68

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Solution

The fourth proportional to 7,135.75, 9,847.34 and 3,992.68 is: 5,509.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,135.75 : 9,847.34 = 3,992.68 : x
  2. Step 2: Convert to fraction form
    7,135.75/9,847.34 = 3,992.68/x
  3. Step 3: Cross multiply
    7,135.75x = 9,847.34 × 3,992.68
  4. Step 4: Simplify right side
    7,135.75x = 39,317,277.47
  5. Step 5: Solve for x
    x = 39,317,277.47/7,135.75
  6. Step 6: Final answer
    x = 5,509.90

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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.