Home / 20,380.69-28,131.33-13,308.22

Finding the Fourth Proportional to 20,380.69, 28,131.33 and 13,308.22

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Solution

The fourth proportional to 20,380.69, 28,131.33 and 13,308.22 is: 18,369.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,380.69 : 28,131.33 = 13,308.22 : x
  2. Step 2: Convert to fraction form
    20,380.69/28,131.33 = 13,308.22/x
  3. Step 3: Cross multiply
    20,380.69x = 28,131.33 × 13,308.22
  4. Step 4: Simplify right side
    20,380.69x = 374,377,928.53
  5. Step 5: Solve for x
    x = 374,377,928.53/20,380.69
  6. Step 6: Final answer
    x = 18,369.25

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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.