Home / 21,137.40-29,169.60-11,705.96

Finding the Fourth Proportional to 21,137.40, 29,169.60 and 11,705.96

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Solution

The fourth proportional to 21,137.40, 29,169.60 and 11,705.96 is: 16,154.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,137.40 : 29,169.60 = 11,705.96 : x
  2. Step 2: Convert to fraction form
    21,137.40/29,169.60 = 11,705.96/x
  3. Step 3: Cross multiply
    21,137.40x = 29,169.60 × 11,705.96
  4. Step 4: Simplify right side
    21,137.40x = 341,458,024.97
  5. Step 5: Solve for x
    x = 341,458,024.97/21,137.40
  6. Step 6: Final answer
    x = 16,154.21

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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.