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Finding the Fourth Proportional to 28,474.52, 42,728.18 and 11,835.09

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Solution

The fourth proportional to 28,474.52, 42,728.18 and 11,835.09 is: 17,759.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,474.52 : 42,728.18 = 11,835.09 : x
  2. Step 2: Convert to fraction form
    28,474.52/42,728.18 = 11,835.09/x
  3. Step 3: Cross multiply
    28,474.52x = 42,728.18 × 11,835.09
  4. Step 4: Simplify right side
    28,474.52x = 505,691,796.66
  5. Step 5: Solve for x
    x = 505,691,796.66/28,474.52
  6. Step 6: Final answer
    x = 17,759.45

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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.