Home / 20,511.82-28,306.32-11,080.38

Finding the Fourth Proportional to 20,511.82, 28,306.32 and 11,080.38

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Solution

The fourth proportional to 20,511.82, 28,306.32 and 11,080.38 is: 15,290.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.82 : 28,306.32 = 11,080.38 : x
  2. Step 2: Convert to fraction form
    20,511.82/28,306.32 = 11,080.38/x
  3. Step 3: Cross multiply
    20,511.82x = 28,306.32 × 11,080.38
  4. Step 4: Simplify right side
    20,511.82x = 313,644,782.00
  5. Step 5: Solve for x
    x = 313,644,782.00/20,511.82
  6. Step 6: Final answer
    x = 15,290.93

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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.