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Finding the Fourth Proportional to 27,105.20, 40,614.60 and 20,106.80

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Solution

The fourth proportional to 27,105.20, 40,614.60 and 20,106.80 is: 30,128.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,105.20 : 40,614.60 = 20,106.80 : x
  2. Step 2: Convert to fraction form
    27,105.20/40,614.60 = 20,106.80/x
  3. Step 3: Cross multiply
    27,105.20x = 40,614.60 × 20,106.80
  4. Step 4: Simplify right side
    27,105.20x = 816,629,639.28
  5. Step 5: Solve for x
    x = 816,629,639.28/27,105.20
  6. Step 6: Final answer
    x = 30,128.15

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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.