Home / 12,682.20-19,040.40-7,422.60

Finding the Fourth Proportional to 12,682.20, 19,040.40 and 7,422.60

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Solution

The fourth proportional to 12,682.20, 19,040.40 and 7,422.60 is: 11,143.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,682.20 : 19,040.40 = 7,422.60 : x
  2. Step 2: Convert to fraction form
    12,682.20/19,040.40 = 7,422.60/x
  3. Step 3: Cross multiply
    12,682.20x = 19,040.40 × 7,422.60
  4. Step 4: Simplify right side
    12,682.20x = 141,329,273.04
  5. Step 5: Solve for x
    x = 141,329,273.04/12,682.20
  6. Step 6: Final answer
    x = 11,143.91

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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.