Home / 20,680.72-28,539.68-11,249.28

Finding the Fourth Proportional to 20,680.72, 28,539.68 and 11,249.28

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Solution

The fourth proportional to 20,680.72, 28,539.68 and 11,249.28 is: 15,524.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.72 : 28,539.68 = 11,249.28 : x
  2. Step 2: Convert to fraction form
    20,680.72/28,539.68 = 11,249.28/x
  3. Step 3: Cross multiply
    20,680.72x = 28,539.68 × 11,249.28
  4. Step 4: Simplify right side
    20,680.72x = 321,050,795.18
  5. Step 5: Solve for x
    x = 321,050,795.18/20,680.72
  6. Step 6: Final answer
    x = 15,524.16

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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.