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Finding the Fourth Proportional to 7,952.78, 11,920.97 and 3,571.49

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Solution

The fourth proportional to 7,952.78, 11,920.97 and 3,571.49 is: 5,353.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,952.78 : 11,920.97 = 3,571.49 : x
  2. Step 2: Convert to fraction form
    7,952.78/11,920.97 = 3,571.49/x
  3. Step 3: Cross multiply
    7,952.78x = 11,920.97 × 3,571.49
  4. Step 4: Simplify right side
    7,952.78x = 42,575,663.88
  5. Step 5: Solve for x
    x = 42,575,663.88/7,952.78
  6. Step 6: Final answer
    x = 5,353.56

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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.