Home / 4,085.19-5,640.74-3,139.49

Finding the Fourth Proportional to 4,085.19, 5,640.74 and 3,139.49

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Solution

The fourth proportional to 4,085.19, 5,640.74 and 3,139.49 is: 4,334.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,085.19 : 5,640.74 = 3,139.49 : x
  2. Step 2: Convert to fraction form
    4,085.19/5,640.74 = 3,139.49/x
  3. Step 3: Cross multiply
    4,085.19x = 5,640.74 × 3,139.49
  4. Step 4: Simplify right side
    4,085.19x = 17,709,002.92
  5. Step 5: Solve for x
    x = 17,709,002.92/4,085.19
  6. Step 6: Final answer
    x = 4,334.93

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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.