Home / 7,135.88-9,847.79-3,992.07

Finding the Fourth Proportional to 7,135.88, 9,847.79 and 3,992.07

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Solution

The fourth proportional to 7,135.88, 9,847.79 and 3,992.07 is: 5,509.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,135.88 : 9,847.79 = 3,992.07 : x
  2. Step 2: Convert to fraction form
    7,135.88/9,847.79 = 3,992.07/x
  3. Step 3: Cross multiply
    7,135.88x = 9,847.79 × 3,992.07
  4. Step 4: Simplify right side
    7,135.88x = 39,312,997.83
  5. Step 5: Solve for x
    x = 39,312,997.83/7,135.88
  6. Step 6: Final answer
    x = 5,509.20

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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.