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Finding the Fourth Proportional to 28,000.80, 41,968.80 and 11,352.60

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Solution

The fourth proportional to 28,000.80, 41,968.80 and 11,352.60 is: 17,015.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,000.80 : 41,968.80 = 11,352.60 : x
  2. Step 2: Convert to fraction form
    28,000.80/41,968.80 = 11,352.60/x
  3. Step 3: Cross multiply
    28,000.80x = 41,968.80 × 11,352.60
  4. Step 4: Simplify right side
    28,000.80x = 476,454,998.88
  5. Step 5: Solve for x
    x = 476,454,998.88/28,000.80
  6. Step 6: Final answer
    x = 17,015.76

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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.