Home / 20,231.67-27,909.32-13,515.15

Finding the Fourth Proportional to 20,231.67, 27,909.32 and 13,515.15

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Solution

The fourth proportional to 20,231.67, 27,909.32 and 13,515.15 is: 18,643.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,231.67 : 27,909.32 = 13,515.15 : x
  2. Step 2: Convert to fraction form
    20,231.67/27,909.32 = 13,515.15/x
  3. Step 3: Cross multiply
    20,231.67x = 27,909.32 × 13,515.15
  4. Step 4: Simplify right side
    20,231.67x = 377,198,578.62
  5. Step 5: Solve for x
    x = 377,198,578.62/20,231.67
  6. Step 6: Final answer
    x = 18,643.97

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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.