Home / 7,135.09-9,846.16-3,991.28

Finding the Fourth Proportional to 7,135.09, 9,846.16 and 3,991.28

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Solution

The fourth proportional to 7,135.09, 9,846.16 and 3,991.28 is: 5,507.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,135.09 : 9,846.16 = 3,991.28 : x
  2. Step 2: Convert to fraction form
    7,135.09/9,846.16 = 3,991.28/x
  3. Step 3: Cross multiply
    7,135.09x = 9,846.16 × 3,991.28
  4. Step 4: Simplify right side
    7,135.09x = 39,298,722.28
  5. Step 5: Solve for x
    x = 39,298,722.28/7,135.09
  6. Step 6: Final answer
    x = 5,507.81

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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.