Home / 4,085.73-5,640.12-2,760.21

Finding the Fourth Proportional to 4,085.73, 5,640.12 and 2,760.21

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Solution

The fourth proportional to 4,085.73, 5,640.12 and 2,760.21 is: 3,810.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,085.73 : 5,640.12 = 2,760.21 : x
  2. Step 2: Convert to fraction form
    4,085.73/5,640.12 = 2,760.21/x
  3. Step 3: Cross multiply
    4,085.73x = 5,640.12 × 2,760.21
  4. Step 4: Simplify right side
    4,085.73x = 15,567,915.63
  5. Step 5: Solve for x
    x = 15,567,915.63/4,085.73
  6. Step 6: Final answer
    x = 3,810.31

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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.