Home / 3,109.90-4,660.93-1,809.85

Finding the Fourth Proportional to 3,109.90, 4,660.93 and 1,809.85

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Solution

The fourth proportional to 3,109.90, 4,660.93 and 1,809.85 is: 2,712.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.90 : 4,660.93 = 1,809.85 : x
  2. Step 2: Convert to fraction form
    3,109.90/4,660.93 = 1,809.85/x
  3. Step 3: Cross multiply
    3,109.90x = 4,660.93 × 1,809.85
  4. Step 4: Simplify right side
    3,109.90x = 8,435,584.16
  5. Step 5: Solve for x
    x = 8,435,584.16/3,109.90
  6. Step 6: Final answer
    x = 2,712.49

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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.