Home / 2,169.20-3,258.60-2,111.60

Finding the Fourth Proportional to 2,169.20, 3,258.60 and 2,111.60

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Solution

The fourth proportional to 2,169.20, 3,258.60 and 2,111.60 is: 3,172.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,169.20 : 3,258.60 = 2,111.60 : x
  2. Step 2: Convert to fraction form
    2,169.20/3,258.60 = 2,111.60/x
  3. Step 3: Cross multiply
    2,169.20x = 3,258.60 × 2,111.60
  4. Step 4: Simplify right side
    2,169.20x = 6,880,859.76
  5. Step 5: Solve for x
    x = 6,880,859.76/2,169.20
  6. Step 6: Final answer
    x = 3,172.07

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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.