Home / 3,129.37-4,321.76-2,707.70

Finding the Fourth Proportional to 3,129.37, 4,321.76 and 2,707.70

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Solution

The fourth proportional to 3,129.37, 4,321.76 and 2,707.70 is: 3,739.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.37 : 4,321.76 = 2,707.70 : x
  2. Step 2: Convert to fraction form
    3,129.37/4,321.76 = 2,707.70/x
  3. Step 3: Cross multiply
    3,129.37x = 4,321.76 × 2,707.70
  4. Step 4: Simplify right side
    3,129.37x = 11,701,994.40
  5. Step 5: Solve for x
    x = 11,701,994.40/3,129.37
  6. Step 6: Final answer
    x = 3,739.41

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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.