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Finding the Fourth Proportional to 7,892.78, 11,839.47 and 2,628.26

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Solution

The fourth proportional to 7,892.78, 11,839.47 and 2,628.26 is: 3,942.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,892.78 : 11,839.47 = 2,628.26 : x
  2. Step 2: Convert to fraction form
    7,892.78/11,839.47 = 2,628.26/x
  3. Step 3: Cross multiply
    7,892.78x = 11,839.47 × 2,628.26
  4. Step 4: Simplify right side
    7,892.78x = 31,117,205.42
  5. Step 5: Solve for x
    x = 31,117,205.42/7,892.78
  6. Step 6: Final answer
    x = 3,942.49

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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.