Home / 3,378.15-4,662.90-2,121.30

Finding the Fourth Proportional to 3,378.15, 4,662.90 and 2,121.30

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Solution

The fourth proportional to 3,378.15, 4,662.90 and 2,121.30 is: 2,928.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,378.15 : 4,662.90 = 2,121.30 : x
  2. Step 2: Convert to fraction form
    3,378.15/4,662.90 = 2,121.30/x
  3. Step 3: Cross multiply
    3,378.15x = 4,662.90 × 2,121.30
  4. Step 4: Simplify right side
    3,378.15x = 9,891,409.77
  5. Step 5: Solve for x
    x = 9,891,409.77/3,378.15
  6. Step 6: Final answer
    x = 2,928.06

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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.