Home / 3,107.68-4,289.52-1,989.28

Finding the Fourth Proportional to 3,107.68, 4,289.52 and 1,989.28

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Solution

The fourth proportional to 3,107.68, 4,289.52 and 1,989.28 is: 2,745.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.68 : 4,289.52 = 1,989.28 : x
  2. Step 2: Convert to fraction form
    3,107.68/4,289.52 = 1,989.28/x
  3. Step 3: Cross multiply
    3,107.68x = 4,289.52 × 1,989.28
  4. Step 4: Simplify right side
    3,107.68x = 8,533,056.35
  5. Step 5: Solve for x
    x = 8,533,056.35/3,107.68
  6. Step 6: Final answer
    x = 2,745.80

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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.