Home / 20,837.74-28,755.87-11,406.31

Finding the Fourth Proportional to 20,837.74, 28,755.87 and 11,406.31

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Solution

The fourth proportional to 20,837.74, 28,755.87 and 11,406.31 is: 15,740.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,837.74 : 28,755.87 = 11,406.31 : x
  2. Step 2: Convert to fraction form
    20,837.74/28,755.87 = 11,406.31/x
  3. Step 3: Cross multiply
    20,837.74x = 28,755.87 × 11,406.31
  4. Step 4: Simplify right side
    20,837.74x = 327,998,367.54
  5. Step 5: Solve for x
    x = 327,998,367.54/20,837.74
  6. Step 6: Final answer
    x = 15,740.59

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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.