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Finding the Fourth Proportional to 18,480.80, 27,721.20 and 10,704.80

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Solution

The fourth proportional to 18,480.80, 27,721.20 and 10,704.80 is: 16,057.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,480.80 : 27,721.20 = 10,704.80 : x
  2. Step 2: Convert to fraction form
    18,480.80/27,721.20 = 10,704.80/x
  3. Step 3: Cross multiply
    18,480.80x = 27,721.20 × 10,704.80
  4. Step 4: Simplify right side
    18,480.80x = 296,749,901.76
  5. Step 5: Solve for x
    x = 296,749,901.76/18,480.80
  6. Step 6: Final answer
    x = 16,057.20

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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.