Home / 3,989.36-5,986.77-1,392.29

Finding the Fourth Proportional to 3,989.36, 5,986.77 and 1,392.29

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Solution

The fourth proportional to 3,989.36, 5,986.77 and 1,392.29 is: 2,089.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.36 : 5,986.77 = 1,392.29 : x
  2. Step 2: Convert to fraction form
    3,989.36/5,986.77 = 1,392.29/x
  3. Step 3: Cross multiply
    3,989.36x = 5,986.77 × 1,392.29
  4. Step 4: Simplify right side
    3,989.36x = 8,335,334.97
  5. Step 5: Solve for x
    x = 8,335,334.97/3,989.36
  6. Step 6: Final answer
    x = 2,089.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.