Home / 21,728.33-29,982.61-12,166.88

Finding the Fourth Proportional to 21,728.33, 29,982.61 and 12,166.88

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Solution

The fourth proportional to 21,728.33, 29,982.61 and 12,166.88 is: 16,788.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,728.33 : 29,982.61 = 12,166.88 : x
  2. Step 2: Convert to fraction form
    21,728.33/29,982.61 = 12,166.88/x
  3. Step 3: Cross multiply
    21,728.33x = 29,982.61 × 12,166.88
  4. Step 4: Simplify right side
    21,728.33x = 364,794,944.79
  5. Step 5: Solve for x
    x = 364,794,944.79/21,728.33
  6. Step 6: Final answer
    x = 16,788.91

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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.