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Finding the Fourth Proportional to 18,708.56, 28,067.47 and 5,560.88

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Solution

The fourth proportional to 18,708.56, 28,067.47 and 5,560.88 is: 8,342.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,708.56 : 28,067.47 = 5,560.88 : x
  2. Step 2: Convert to fraction form
    18,708.56/28,067.47 = 5,560.88/x
  3. Step 3: Cross multiply
    18,708.56x = 28,067.47 × 5,560.88
  4. Step 4: Simplify right side
    18,708.56x = 156,079,783.59
  5. Step 5: Solve for x
    x = 156,079,783.59/18,708.56
  6. Step 6: Final answer
    x = 8,342.69

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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.