Home / 20,619.75-30,934.19-8,772.90

Finding the Fourth Proportional to 20,619.75, 30,934.19 and 8,772.90

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Solution

The fourth proportional to 20,619.75, 30,934.19 and 8,772.90 is: 13,161.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.75 : 30,934.19 = 8,772.90 : x
  2. Step 2: Convert to fraction form
    20,619.75/30,934.19 = 8,772.90/x
  3. Step 3: Cross multiply
    20,619.75x = 30,934.19 × 8,772.90
  4. Step 4: Simplify right side
    20,619.75x = 271,382,555.45
  5. Step 5: Solve for x
    x = 271,382,555.45/20,619.75
  6. Step 6: Final answer
    x = 13,161.29

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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.