Home / 20,118.21-27,761.70-11,166.09

Finding the Fourth Proportional to 20,118.21, 27,761.70 and 11,166.09

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Solution

The fourth proportional to 20,118.21, 27,761.70 and 11,166.09 is: 15,408.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,118.21 : 27,761.70 = 11,166.09 : x
  2. Step 2: Convert to fraction form
    20,118.21/27,761.70 = 11,166.09/x
  3. Step 3: Cross multiply
    20,118.21x = 27,761.70 × 11,166.09
  4. Step 4: Simplify right side
    20,118.21x = 309,989,640.75
  5. Step 5: Solve for x
    x = 309,989,640.75/20,118.21
  6. Step 6: Final answer
    x = 15,408.41

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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.