Home / 13,939.91-20,909.58-5,619.69

Finding the Fourth Proportional to 13,939.91, 20,909.58 and 5,619.69

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Solution

The fourth proportional to 13,939.91, 20,909.58 and 5,619.69 is: 8,429.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,939.91 : 20,909.58 = 5,619.69 : x
  2. Step 2: Convert to fraction form
    13,939.91/20,909.58 = 5,619.69/x
  3. Step 3: Cross multiply
    13,939.91x = 20,909.58 × 5,619.69
  4. Step 4: Simplify right side
    13,939.91x = 117,505,357.63
  5. Step 5: Solve for x
    x = 117,505,357.63/13,939.91
  6. Step 6: Final answer
    x = 8,429.42

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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.