Home / 20,121.39-27,766.22-11,168.89

Finding the Fourth Proportional to 20,121.39, 27,766.22 and 11,168.89

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Solution

The fourth proportional to 20,121.39, 27,766.22 and 11,168.89 is: 15,412.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.39 : 27,766.22 = 11,168.89 : x
  2. Step 2: Convert to fraction form
    20,121.39/27,766.22 = 11,168.89/x
  3. Step 3: Cross multiply
    20,121.39x = 27,766.22 × 11,168.89
  4. Step 4: Simplify right side
    20,121.39x = 310,117,731.64
  5. Step 5: Solve for x
    x = 310,117,731.64/20,121.39
  6. Step 6: Final answer
    x = 15,412.34

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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.