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Finding the Fourth Proportional to 28,311.75, 42,487.07 and 9,843.75

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Solution

The fourth proportional to 28,311.75, 42,487.07 and 9,843.75 is: 14,772.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,311.75 : 42,487.07 = 9,843.75 : x
  2. Step 2: Convert to fraction form
    28,311.75/42,487.07 = 9,843.75/x
  3. Step 3: Cross multiply
    28,311.75x = 42,487.07 × 9,843.75
  4. Step 4: Simplify right side
    28,311.75x = 418,232,046.09
  5. Step 5: Solve for x
    x = 418,232,046.09/28,311.75
  6. Step 6: Final answer
    x = 14,772.38

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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.