Home / 3,989.10-5,486.64-3,201.42

Finding the Fourth Proportional to 3,989.10, 5,486.64 and 3,201.42

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Solution

The fourth proportional to 3,989.10, 5,486.64 and 3,201.42 is: 4,403.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.10 : 5,486.64 = 3,201.42 : x
  2. Step 2: Convert to fraction form
    3,989.10/5,486.64 = 3,201.42/x
  3. Step 3: Cross multiply
    3,989.10x = 5,486.64 × 3,201.42
  4. Step 4: Simplify right side
    3,989.10x = 17,565,039.03
  5. Step 5: Solve for x
    x = 17,565,039.03/3,989.10
  6. Step 6: Final answer
    x = 4,403.26

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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.