Home / 20,170.90-30,267.15-8,485.30

Finding the Fourth Proportional to 20,170.90, 30,267.15 and 8,485.30

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Solution

The fourth proportional to 20,170.90, 30,267.15 and 8,485.30 is: 12,732.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,170.90 : 30,267.15 = 8,485.30 : x
  2. Step 2: Convert to fraction form
    20,170.90/30,267.15 = 8,485.30/x
  3. Step 3: Cross multiply
    20,170.90x = 30,267.15 × 8,485.30
  4. Step 4: Simplify right side
    20,170.90x = 256,825,847.90
  5. Step 5: Solve for x
    x = 256,825,847.90/20,170.90
  6. Step 6: Final answer
    x = 12,732.49

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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.