Home / 20,642.82-28,487.07-11,211.39

Finding the Fourth Proportional to 20,642.82, 28,487.07 and 11,211.39

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Solution

The fourth proportional to 20,642.82, 28,487.07 and 11,211.39 is: 15,471.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.82 : 28,487.07 = 11,211.39 : x
  2. Step 2: Convert to fraction form
    20,642.82/28,487.07 = 11,211.39/x
  3. Step 3: Cross multiply
    20,642.82x = 28,487.07 × 11,211.39
  4. Step 4: Simplify right side
    20,642.82x = 319,379,651.73
  5. Step 5: Solve for x
    x = 319,379,651.73/20,642.82
  6. Step 6: Final answer
    x = 15,471.71

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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.