Home / 12,126.97-16,735.37-6,821.78

Finding the Fourth Proportional to 12,126.97, 16,735.37 and 6,821.78

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Solution

The fourth proportional to 12,126.97, 16,735.37 and 6,821.78 is: 9,414.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,126.97 : 16,735.37 = 6,821.78 : x
  2. Step 2: Convert to fraction form
    12,126.97/16,735.37 = 6,821.78/x
  3. Step 3: Cross multiply
    12,126.97x = 16,735.37 × 6,821.78
  4. Step 4: Simplify right side
    12,126.97x = 114,165,020.09
  5. Step 5: Solve for x
    x = 114,165,020.09/12,126.97
  6. Step 6: Final answer
    x = 9,414.14

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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.