Home / 3,891.12-5,803.19-3,309.81

Finding the Fourth Proportional to 3,891.12, 5,803.19 and 3,309.81

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Solution

The fourth proportional to 3,891.12, 5,803.19 and 3,309.81 is: 4,936.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.12 : 5,803.19 = 3,309.81 : x
  2. Step 2: Convert to fraction form
    3,891.12/5,803.19 = 3,309.81/x
  3. Step 3: Cross multiply
    3,891.12x = 5,803.19 × 3,309.81
  4. Step 4: Simplify right side
    3,891.12x = 19,207,439.74
  5. Step 5: Solve for x
    x = 19,207,439.74/3,891.12
  6. Step 6: Final answer
    x = 4,936.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.