Home / 20,837.06-28,755.09-11,405.54

Finding the Fourth Proportional to 20,837.06, 28,755.09 and 11,405.54

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Solution

The fourth proportional to 20,837.06, 28,755.09 and 11,405.54 is: 15,739.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,837.06 : 28,755.09 = 11,405.54 : x
  2. Step 2: Convert to fraction form
    20,837.06/28,755.09 = 11,405.54/x
  3. Step 3: Cross multiply
    20,837.06x = 28,755.09 × 11,405.54
  4. Step 4: Simplify right side
    20,837.06x = 327,967,329.20
  5. Step 5: Solve for x
    x = 327,967,329.20/20,837.06
  6. Step 6: Final answer
    x = 15,739.62

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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.