Home / 20,080.86-27,711.82-11,128.51

Finding the Fourth Proportional to 20,080.86, 27,711.82 and 11,128.51

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Solution

The fourth proportional to 20,080.86, 27,711.82 and 11,128.51 is: 15,357.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,080.86 : 27,711.82 = 11,128.51 : x
  2. Step 2: Convert to fraction form
    20,080.86/27,711.82 = 11,128.51/x
  3. Step 3: Cross multiply
    20,080.86x = 27,711.82 × 11,128.51
  4. Step 4: Simplify right side
    20,080.86x = 308,391,265.99
  5. Step 5: Solve for x
    x = 308,391,265.99/20,080.86
  6. Step 6: Final answer
    x = 15,357.47

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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.