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Finding the Fourth Proportional to 18,615.20, 27,922.80 and 13,074.80

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Solution

The fourth proportional to 18,615.20, 27,922.80 and 13,074.80 is: 19,612.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,615.20 : 27,922.80 = 13,074.80 : x
  2. Step 2: Convert to fraction form
    18,615.20/27,922.80 = 13,074.80/x
  3. Step 3: Cross multiply
    18,615.20x = 27,922.80 × 13,074.80
  4. Step 4: Simplify right side
    18,615.20x = 365,085,025.44
  5. Step 5: Solve for x
    x = 365,085,025.44/18,615.20
  6. Step 6: Final answer
    x = 19,612.20

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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.