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Finding the Fourth Proportional to 7,190.90, 10,787.89 and 4,072.38

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Solution

The fourth proportional to 7,190.90, 10,787.89 and 4,072.38 is: 6,109.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,190.90 : 10,787.89 = 4,072.38 : x
  2. Step 2: Convert to fraction form
    7,190.90/10,787.89 = 4,072.38/x
  3. Step 3: Cross multiply
    7,190.90x = 10,787.89 × 4,072.38
  4. Step 4: Simplify right side
    7,190.90x = 43,932,387.48
  5. Step 5: Solve for x
    x = 43,932,387.48/7,190.90
  6. Step 6: Final answer
    x = 6,109.44

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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.