Home / 3,072.99-4,239.09-2,129.70

Finding the Fourth Proportional to 3,072.99, 4,239.09 and 2,129.70

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Solution

The fourth proportional to 3,072.99, 4,239.09 and 2,129.70 is: 2,937.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,072.99 : 4,239.09 = 2,129.70 : x
  2. Step 2: Convert to fraction form
    3,072.99/4,239.09 = 2,129.70/x
  3. Step 3: Cross multiply
    3,072.99x = 4,239.09 × 2,129.70
  4. Step 4: Simplify right side
    3,072.99x = 9,027,989.97
  5. Step 5: Solve for x
    x = 9,027,989.97/3,072.99
  6. Step 6: Final answer
    x = 2,937.85

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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.