Home / 3,181.75-4,389.68-1,986.28

Finding the Fourth Proportional to 3,181.75, 4,389.68 and 1,986.28

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Solution

The fourth proportional to 3,181.75, 4,389.68 and 1,986.28 is: 2,740.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,181.75 : 4,389.68 = 1,986.28 : x
  2. Step 2: Convert to fraction form
    3,181.75/4,389.68 = 1,986.28/x
  3. Step 3: Cross multiply
    3,181.75x = 4,389.68 × 1,986.28
  4. Step 4: Simplify right side
    3,181.75x = 8,719,118.17
  5. Step 5: Solve for x
    x = 8,719,118.17/3,181.75
  6. Step 6: Final answer
    x = 2,740.36

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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.