Home / 21,074.20-29,083.24-12,121.70

Finding the Fourth Proportional to 21,074.20, 29,083.24 and 12,121.70

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Solution

The fourth proportional to 21,074.20, 29,083.24 and 12,121.70 is: 16,728.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,074.20 : 29,083.24 = 12,121.70 : x
  2. Step 2: Convert to fraction form
    21,074.20/29,083.24 = 12,121.70/x
  3. Step 3: Cross multiply
    21,074.20x = 29,083.24 × 12,121.70
  4. Step 4: Simplify right side
    21,074.20x = 352,538,310.31
  5. Step 5: Solve for x
    x = 352,538,310.31/21,074.20
  6. Step 6: Final answer
    x = 16,728.43

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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.