Home / 21,971.97-30,321.35-11,900.43

Finding the Fourth Proportional to 21,971.97, 30,321.35 and 11,900.43

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Solution

The fourth proportional to 21,971.97, 30,321.35 and 11,900.43 is: 16,422.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,971.97 : 30,321.35 = 11,900.43 : x
  2. Step 2: Convert to fraction form
    21,971.97/30,321.35 = 11,900.43/x
  3. Step 3: Cross multiply
    21,971.97x = 30,321.35 × 11,900.43
  4. Step 4: Simplify right side
    21,971.97x = 360,837,103.18
  5. Step 5: Solve for x
    x = 360,837,103.18/21,971.97
  6. Step 6: Final answer
    x = 16,422.61

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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.