Home / 12,828.12-19,198.74-7,900.92

Finding the Fourth Proportional to 12,828.12, 19,198.74 and 7,900.92

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Solution

The fourth proportional to 12,828.12, 19,198.74 and 7,900.92 is: 11,824.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,828.12 : 19,198.74 = 7,900.92 : x
  2. Step 2: Convert to fraction form
    12,828.12/19,198.74 = 7,900.92/x
  3. Step 3: Cross multiply
    12,828.12x = 19,198.74 × 7,900.92
  4. Step 4: Simplify right side
    12,828.12x = 151,687,708.84
  5. Step 5: Solve for x
    x = 151,687,708.84/12,828.12
  6. Step 6: Final answer
    x = 11,824.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.