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Finding the Fourth Proportional to 28,132.78, 42,198.04 and 7,072.99

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Solution

The fourth proportional to 28,132.78, 42,198.04 and 7,072.99 is: 10,609.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,132.78 : 42,198.04 = 7,072.99 : x
  2. Step 2: Convert to fraction form
    28,132.78/42,198.04 = 7,072.99/x
  3. Step 3: Cross multiply
    28,132.78x = 42,198.04 × 7,072.99
  4. Step 4: Simplify right side
    28,132.78x = 298,466,314.94
  5. Step 5: Solve for x
    x = 298,466,314.94/28,132.78
  6. Step 6: Final answer
    x = 10,609.20

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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.