Home / 3,112.80-4,672.80-1,881.60

Finding the Fourth Proportional to 3,112.80, 4,672.80 and 1,881.60

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Solution

The fourth proportional to 3,112.80, 4,672.80 and 1,881.60 is: 2,824.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,112.80 : 4,672.80 = 1,881.60 : x
  2. Step 2: Convert to fraction form
    3,112.80/4,672.80 = 1,881.60/x
  3. Step 3: Cross multiply
    3,112.80x = 4,672.80 × 1,881.60
  4. Step 4: Simplify right side
    3,112.80x = 8,792,340.48
  5. Step 5: Solve for x
    x = 8,792,340.48/3,112.80
  6. Step 6: Final answer
    x = 2,824.58

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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.