Home / 20,480.31-30,722.29-8,790.80

Finding the Fourth Proportional to 20,480.31, 30,722.29 and 8,790.80

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Solution

The fourth proportional to 20,480.31, 30,722.29 and 8,790.80 is: 13,186.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,480.31 : 30,722.29 = 8,790.80 : x
  2. Step 2: Convert to fraction form
    20,480.31/30,722.29 = 8,790.80/x
  3. Step 3: Cross multiply
    20,480.31x = 30,722.29 × 8,790.80
  4. Step 4: Simplify right side
    20,480.31x = 270,073,331.34
  5. Step 5: Solve for x
    x = 270,073,331.34/20,480.31
  6. Step 6: Final answer
    x = 13,186.97

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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.