Home / 3,121.74-4,305.86-2,126.62

Finding the Fourth Proportional to 3,121.74, 4,305.86 and 2,126.62

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Solution

The fourth proportional to 3,121.74, 4,305.86 and 2,126.62 is: 2,933.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.74 : 4,305.86 = 2,126.62 : x
  2. Step 2: Convert to fraction form
    3,121.74/4,305.86 = 2,126.62/x
  3. Step 3: Cross multiply
    3,121.74x = 4,305.86 × 2,126.62
  4. Step 4: Simplify right side
    3,121.74x = 9,156,927.99
  5. Step 5: Solve for x
    x = 9,156,927.99/3,121.74
  6. Step 6: Final answer
    x = 2,933.28

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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.