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Finding the Fourth Proportional to 28,198.98, 42,299.50 and 9,479.64

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Solution

The fourth proportional to 28,198.98, 42,299.50 and 9,479.64 is: 14,219.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,198.98 : 42,299.50 = 9,479.64 : x
  2. Step 2: Convert to fraction form
    28,198.98/42,299.50 = 9,479.64/x
  3. Step 3: Cross multiply
    28,198.98x = 42,299.50 × 9,479.64
  4. Step 4: Simplify right side
    28,198.98x = 400,984,032.18
  5. Step 5: Solve for x
    x = 400,984,032.18/28,198.98
  6. Step 6: Final answer
    x = 14,219.81

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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.