Home / 20,680.75-28,539.54-11,249.32

Finding the Fourth Proportional to 20,680.75, 28,539.54 and 11,249.32

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Solution

The fourth proportional to 20,680.75, 28,539.54 and 11,249.32 is: 15,524.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.75 : 28,539.54 = 11,249.32 : x
  2. Step 2: Convert to fraction form
    20,680.75/28,539.54 = 11,249.32/x
  3. Step 3: Cross multiply
    20,680.75x = 28,539.54 × 11,249.32
  4. Step 4: Simplify right side
    20,680.75x = 321,050,418.11
  5. Step 5: Solve for x
    x = 321,050,418.11/20,680.75
  6. Step 6: Final answer
    x = 15,524.12

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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.