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Finding the Fourth Proportional to 28,754.40, 43,147.80 and 11,221.95

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Solution

The fourth proportional to 28,754.40, 43,147.80 and 11,221.95 is: 16,839.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,754.40 : 43,147.80 = 11,221.95 : x
  2. Step 2: Convert to fraction form
    28,754.40/43,147.80 = 11,221.95/x
  3. Step 3: Cross multiply
    28,754.40x = 43,147.80 × 11,221.95
  4. Step 4: Simplify right side
    28,754.40x = 484,202,454.21
  5. Step 5: Solve for x
    x = 484,202,454.21/28,754.40
  6. Step 6: Final answer
    x = 16,839.25

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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.