Home / 21,972.34-30,321.92-11,900.90

Finding the Fourth Proportional to 21,972.34, 30,321.92 and 11,900.90

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Solution

The fourth proportional to 21,972.34, 30,321.92 and 11,900.90 is: 16,423.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,972.34 : 30,321.92 = 11,900.90 : x
  2. Step 2: Convert to fraction form
    21,972.34/30,321.92 = 11,900.90/x
  3. Step 3: Cross multiply
    21,972.34x = 30,321.92 × 11,900.90
  4. Step 4: Simplify right side
    21,972.34x = 360,858,137.73
  5. Step 5: Solve for x
    x = 360,858,137.73/21,972.34
  6. Step 6: Final answer
    x = 16,423.29

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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.