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Finding the Fourth Proportional to 20,131.60, 30,168.60 and 14,825.20

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Solution

The fourth proportional to 20,131.60, 30,168.60 and 14,825.20 is: 22,216.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,131.60 : 30,168.60 = 14,825.20 : x
  2. Step 2: Convert to fraction form
    20,131.60/30,168.60 = 14,825.20/x
  3. Step 3: Cross multiply
    20,131.60x = 30,168.60 × 14,825.20
  4. Step 4: Simplify right side
    20,131.60x = 447,255,528.72
  5. Step 5: Solve for x
    x = 447,255,528.72/20,131.60
  6. Step 6: Final answer
    x = 22,216.59

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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.