Home / 20,081.04-27,711.07-11,128.31

Finding the Fourth Proportional to 20,081.04, 27,711.07 and 11,128.31

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Solution

The fourth proportional to 20,081.04, 27,711.07 and 11,128.31 is: 15,356.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,081.04 : 27,711.07 = 11,128.31 : x
  2. Step 2: Convert to fraction form
    20,081.04/27,711.07 = 11,128.31/x
  3. Step 3: Cross multiply
    20,081.04x = 27,711.07 × 11,128.31
  4. Step 4: Simplify right side
    20,081.04x = 308,377,377.39
  5. Step 5: Solve for x
    x = 308,377,377.39/20,081.04
  6. Step 6: Final answer
    x = 15,356.64

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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.