Home / 20,112.80-27,755.67-11,160.30

Finding the Fourth Proportional to 20,112.80, 27,755.67 and 11,160.30

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Solution

The fourth proportional to 20,112.80, 27,755.67 and 11,160.30 is: 15,401.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,112.80 : 27,755.67 = 11,160.30 : x
  2. Step 2: Convert to fraction form
    20,112.80/27,755.67 = 11,160.30/x
  3. Step 3: Cross multiply
    20,112.80x = 27,755.67 × 11,160.30
  4. Step 4: Simplify right side
    20,112.80x = 309,761,603.90
  5. Step 5: Solve for x
    x = 309,761,603.90/20,112.80
  6. Step 6: Final answer
    x = 15,401.22

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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.