Home / 20,837-28,755.34-11,405.36

Finding the Fourth Proportional to 20,837, 28,755.34 and 11,405.36

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Solution

The fourth proportional to 20,837, 28,755.34 and 11,405.36 is: 15,739.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,837 : 28,755.34 = 11,405.36 : x
  2. Step 2: Convert to fraction form
    20,837/28,755.34 = 11,405.36/x
  3. Step 3: Cross multiply
    20,837x = 28,755.34 × 11,405.36
  4. Step 4: Simplify right side
    20,837x = 327,965,004.62
  5. Step 5: Solve for x
    x = 327,965,004.62/20,837
  6. Step 6: Final answer
    x = 15,739.55

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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.