Home / 20,786.86-31,182.94-9,539.47

Finding the Fourth Proportional to 20,786.86, 31,182.94 and 9,539.47

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Solution

The fourth proportional to 20,786.86, 31,182.94 and 9,539.47 is: 14,310.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.86 : 31,182.94 = 9,539.47 : x
  2. Step 2: Convert to fraction form
    20,786.86/31,182.94 = 9,539.47/x
  3. Step 3: Cross multiply
    20,786.86x = 31,182.94 × 9,539.47
  4. Step 4: Simplify right side
    20,786.86x = 297,468,771.54
  5. Step 5: Solve for x
    x = 297,468,771.54/20,786.86
  6. Step 6: Final answer
    x = 14,310.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.