Home / 20,523.06-28,321.79-11,091.60

Finding the Fourth Proportional to 20,523.06, 28,321.79 and 11,091.60

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Solution

The fourth proportional to 20,523.06, 28,321.79 and 11,091.60 is: 15,306.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,523.06 : 28,321.79 = 11,091.60 : x
  2. Step 2: Convert to fraction form
    20,523.06/28,321.79 = 11,091.60/x
  3. Step 3: Cross multiply
    20,523.06x = 28,321.79 × 11,091.60
  4. Step 4: Simplify right side
    20,523.06x = 314,133,910.51
  5. Step 5: Solve for x
    x = 314,133,910.51/20,523.06
  6. Step 6: Final answer
    x = 15,306.39

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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.