Home / 3,121.55-4,283.76-2,945.48

Finding the Fourth Proportional to 3,121.55, 4,283.76 and 2,945.48

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Solution

The fourth proportional to 3,121.55, 4,283.76 and 2,945.48 is: 4,042.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.55 : 4,283.76 = 2,945.48 : x
  2. Step 2: Convert to fraction form
    3,121.55/4,283.76 = 2,945.48/x
  3. Step 3: Cross multiply
    3,121.55x = 4,283.76 × 2,945.48
  4. Step 4: Simplify right side
    3,121.55x = 12,617,702.46
  5. Step 5: Solve for x
    x = 12,617,702.46/3,121.55
  6. Step 6: Final answer
    x = 4,042.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.