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Finding the Fourth Proportional to 28,474.59, 42,704.50 and 8,479.41

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Solution

The fourth proportional to 28,474.59, 42,704.50 and 8,479.41 is: 12,716.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,474.59 : 42,704.50 = 8,479.41 : x
  2. Step 2: Convert to fraction form
    28,474.59/42,704.50 = 8,479.41/x
  3. Step 3: Cross multiply
    28,474.59x = 42,704.50 × 8,479.41
  4. Step 4: Simplify right side
    28,474.59x = 362,108,964.35
  5. Step 5: Solve for x
    x = 362,108,964.35/28,474.59
  6. Step 6: Final answer
    x = 12,716.92

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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.