Home / 20,080.86-27,711.74-11,128.50

Finding the Fourth Proportional to 20,080.86, 27,711.74 and 11,128.50

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Solution

The fourth proportional to 20,080.86, 27,711.74 and 11,128.50 is: 15,357.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,080.86 : 27,711.74 = 11,128.50 : x
  2. Step 2: Convert to fraction form
    20,080.86/27,711.74 = 11,128.50/x
  3. Step 3: Cross multiply
    20,080.86x = 27,711.74 × 11,128.50
  4. Step 4: Simplify right side
    20,080.86x = 308,390,042.95
  5. Step 5: Solve for x
    x = 308,390,042.95/20,080.86
  6. Step 6: Final answer
    x = 15,357.42

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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.