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Finding the Fourth Proportional to 18,704.80, 28,057.20 and 11,305.45

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Solution

The fourth proportional to 18,704.80, 28,057.20 and 11,305.45 is: 16,958.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,704.80 : 28,057.20 = 11,305.45 : x
  2. Step 2: Convert to fraction form
    18,704.80/28,057.20 = 11,305.45/x
  3. Step 3: Cross multiply
    18,704.80x = 28,057.20 × 11,305.45
  4. Step 4: Simplify right side
    18,704.80x = 317,199,271.74
  5. Step 5: Solve for x
    x = 317,199,271.74/18,704.80
  6. Step 6: Final answer
    x = 16,958.18

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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.