Home / 21,137.22-29,169.36-11,705.78

Finding the Fourth Proportional to 21,137.22, 29,169.36 and 11,705.78

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Solution

The fourth proportional to 21,137.22, 29,169.36 and 11,705.78 is: 16,153.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,137.22 : 29,169.36 = 11,705.78 : x
  2. Step 2: Convert to fraction form
    21,137.22/29,169.36 = 11,705.78/x
  3. Step 3: Cross multiply
    21,137.22x = 29,169.36 × 11,705.78
  4. Step 4: Simplify right side
    21,137.22x = 341,450,183.82
  5. Step 5: Solve for x
    x = 341,450,183.82/21,137.22
  6. Step 6: Final answer
    x = 16,153.98

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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.