Home / 30,379.15-41,918.19-20,291.41

Finding the Fourth Proportional to 30,379.15, 41,918.19 and 20,291.41

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Solution

The fourth proportional to 30,379.15, 41,918.19 and 20,291.41 is: 27,998.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,379.15 : 41,918.19 = 20,291.41 : x
  2. Step 2: Convert to fraction form
    30,379.15/41,918.19 = 20,291.41/x
  3. Step 3: Cross multiply
    30,379.15x = 41,918.19 × 20,291.41
  4. Step 4: Simplify right side
    30,379.15x = 850,578,970.16
  5. Step 5: Solve for x
    x = 850,578,970.16/30,379.15
  6. Step 6: Final answer
    x = 27,998.78

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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.