Home / 21,972.38-30,321.73-11,900.59

Finding the Fourth Proportional to 21,972.38, 30,321.73 and 11,900.59

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Solution

The fourth proportional to 21,972.38, 30,321.73 and 11,900.59 is: 16,422.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,972.38 : 30,321.73 = 11,900.59 : x
  2. Step 2: Convert to fraction form
    21,972.38/30,321.73 = 11,900.59/x
  3. Step 3: Cross multiply
    21,972.38x = 30,321.73 × 11,900.59
  4. Step 4: Simplify right side
    21,972.38x = 360,846,476.82
  5. Step 5: Solve for x
    x = 360,846,476.82/21,972.38
  6. Step 6: Final answer
    x = 16,422.73

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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.