Home / 3,126.26-4,312.44-1,989.83

Finding the Fourth Proportional to 3,126.26, 4,312.44 and 1,989.83

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Solution

The fourth proportional to 3,126.26, 4,312.44 and 1,989.83 is: 2,744.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126.26 : 4,312.44 = 1,989.83 : x
  2. Step 2: Convert to fraction form
    3,126.26/4,312.44 = 1,989.83/x
  3. Step 3: Cross multiply
    3,126.26x = 4,312.44 × 1,989.83
  4. Step 4: Simplify right side
    3,126.26x = 8,581,033.27
  5. Step 5: Solve for x
    x = 8,581,033.27/3,126.26
  6. Step 6: Final answer
    x = 2,744.82

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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.