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Finding the Fourth Proportional to 20,181.20, 30,271.80 and 18,366.80

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Solution

The fourth proportional to 20,181.20, 30,271.80 and 18,366.80 is: 27,550.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,181.20 : 30,271.80 = 18,366.80 : x
  2. Step 2: Convert to fraction form
    20,181.20/30,271.80 = 18,366.80/x
  3. Step 3: Cross multiply
    20,181.20x = 30,271.80 × 18,366.80
  4. Step 4: Simplify right side
    20,181.20x = 555,996,096.24
  5. Step 5: Solve for x
    x = 555,996,096.24/20,181.20
  6. Step 6: Final answer
    x = 27,550.20

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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.