Home / 20,680.58-28,539.28-11,249.14

Finding the Fourth Proportional to 20,680.58, 28,539.28 and 11,249.14

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Solution

The fourth proportional to 20,680.58, 28,539.28 and 11,249.14 is: 15,523.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.58 : 28,539.28 = 11,249.14 : x
  2. Step 2: Convert to fraction form
    20,680.58/28,539.28 = 11,249.14/x
  3. Step 3: Cross multiply
    20,680.58x = 28,539.28 × 11,249.14
  4. Step 4: Simplify right side
    20,680.58x = 321,042,356.22
  5. Step 5: Solve for x
    x = 321,042,356.22/20,680.58
  6. Step 6: Final answer
    x = 15,523.86

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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.