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Finding the Fourth Proportional to 28,080.83, 42,121.07 and 7,020.77

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Solution

The fourth proportional to 28,080.83, 42,121.07 and 7,020.77 is: 10,531.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,080.83 : 42,121.07 = 7,020.77 : x
  2. Step 2: Convert to fraction form
    28,080.83/42,121.07 = 7,020.77/x
  3. Step 3: Cross multiply
    28,080.83x = 42,121.07 × 7,020.77
  4. Step 4: Simplify right side
    28,080.83x = 295,722,344.62
  5. Step 5: Solve for x
    x = 295,722,344.62/28,080.83
  6. Step 6: Final answer
    x = 10,531.11

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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.