Home / 21,972.11-30,321.47-11,900.54

Finding the Fourth Proportional to 21,972.11, 30,321.47 and 11,900.54

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Solution

The fourth proportional to 21,972.11, 30,321.47 and 11,900.54 is: 16,422.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,972.11 : 30,321.47 = 11,900.54 : x
  2. Step 2: Convert to fraction form
    21,972.11/30,321.47 = 11,900.54/x
  3. Step 3: Cross multiply
    21,972.11x = 30,321.47 × 11,900.54
  4. Step 4: Simplify right side
    21,972.11x = 360,841,972.15
  5. Step 5: Solve for x
    x = 360,841,972.15/21,972.11
  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.