Home / 20,680.64-28,539.36-11,249.12

Finding the Fourth Proportional to 20,680.64, 28,539.36 and 11,249.12

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Solution

The fourth proportional to 20,680.64, 28,539.36 and 11,249.12 is: 15,523.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.64 : 28,539.36 = 11,249.12 : x
  2. Step 2: Convert to fraction form
    20,680.64/28,539.36 = 11,249.12/x
  3. Step 3: Cross multiply
    20,680.64x = 28,539.36 × 11,249.12
  4. Step 4: Simplify right side
    20,680.64x = 321,042,685.36
  5. Step 5: Solve for x
    x = 321,042,685.36/20,680.64
  6. Step 6: Final answer
    x = 15,523.83

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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.