Home / 20,379.89-30,616.74-14,389.80

Finding the Fourth Proportional to 20,379.89, 30,616.74 and 14,389.80

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Solution

The fourth proportional to 20,379.89, 30,616.74 and 14,389.80 is: 21,617.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.89 : 30,616.74 = 14,389.80 : x
  2. Step 2: Convert to fraction form
    20,379.89/30,616.74 = 14,389.80/x
  3. Step 3: Cross multiply
    20,379.89x = 30,616.74 × 14,389.80
  4. Step 4: Simplify right side
    20,379.89x = 440,568,765.25
  5. Step 5: Solve for x
    x = 440,568,765.25/20,379.89
  6. Step 6: Final answer
    x = 21,617.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.