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Finding the Fourth Proportional to 21,682.80, 29,921.04 and 12,251.52

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Solution

The fourth proportional to 21,682.80, 29,921.04 and 12,251.52 is: 16,906.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,682.80 : 29,921.04 = 12,251.52 : x
  2. Step 2: Convert to fraction form
    21,682.80/29,921.04 = 12,251.52/x
  3. Step 3: Cross multiply
    21,682.80x = 29,921.04 × 12,251.52
  4. Step 4: Simplify right side
    21,682.80x = 366,578,219.98
  5. Step 5: Solve for x
    x = 366,578,219.98/21,682.80
  6. Step 6: Final answer
    x = 16,906.41

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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.