Home / 21,144.96-29,175.84-12,761.92

Finding the Fourth Proportional to 21,144.96, 29,175.84 and 12,761.92

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Solution

The fourth proportional to 21,144.96, 29,175.84 and 12,761.92 is: 17,608.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,144.96 : 29,175.84 = 12,761.92 : x
  2. Step 2: Convert to fraction form
    21,144.96/29,175.84 = 12,761.92/x
  3. Step 3: Cross multiply
    21,144.96x = 29,175.84 × 12,761.92
  4. Step 4: Simplify right side
    21,144.96x = 372,339,736.01
  5. Step 5: Solve for x
    x = 372,339,736.01/21,144.96
  6. Step 6: Final answer
    x = 17,608.91

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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.