Home / 20,100.60-30,165.30-8,422.20

Finding the Fourth Proportional to 20,100.60, 30,165.30 and 8,422.20

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Solution

The fourth proportional to 20,100.60, 30,165.30 and 8,422.20 is: 12,639.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,100.60 : 30,165.30 = 8,422.20 : x
  2. Step 2: Convert to fraction form
    20,100.60/30,165.30 = 8,422.20/x
  3. Step 3: Cross multiply
    20,100.60x = 30,165.30 × 8,422.20
  4. Step 4: Simplify right side
    20,100.60x = 254,058,189.66
  5. Step 5: Solve for x
    x = 254,058,189.66/20,100.60
  6. Step 6: Final answer
    x = 12,639.33

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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.