Home / 21,379.76-29,504-11,948.36

Finding the Fourth Proportional to 21,379.76, 29,504 and 11,948.36

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Solution

The fourth proportional to 21,379.76, 29,504 and 11,948.36 is: 16,488.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,379.76 : 29,504 = 11,948.36 : x
  2. Step 2: Convert to fraction form
    21,379.76/29,504 = 11,948.36/x
  3. Step 3: Cross multiply
    21,379.76x = 29,504 × 11,948.36
  4. Step 4: Simplify right side
    21,379.76x = 352,524,413.44
  5. Step 5: Solve for x
    x = 352,524,413.44/21,379.76
  6. Step 6: Final answer
    x = 16,488.70

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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.