Home / 3,122.69-4,310.01-2,128.37

Finding the Fourth Proportional to 3,122.69, 4,310.01 and 2,128.37

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Solution

The fourth proportional to 3,122.69, 4,310.01 and 2,128.37 is: 2,937.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.69 : 4,310.01 = 2,128.37 : x
  2. Step 2: Convert to fraction form
    3,122.69/4,310.01 = 2,128.37/x
  3. Step 3: Cross multiply
    3,122.69x = 4,310.01 × 2,128.37
  4. Step 4: Simplify right side
    3,122.69x = 9,173,274.43
  5. Step 5: Solve for x
    x = 9,173,274.43/3,122.69
  6. Step 6: Final answer
    x = 2,937.62

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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.