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Finding the Fourth Proportional to 7,958.52, 11,937.78 and 2,115.72

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Solution

The fourth proportional to 7,958.52, 11,937.78 and 2,115.72 is: 3,173.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,958.52 : 11,937.78 = 2,115.72 : x
  2. Step 2: Convert to fraction form
    7,958.52/11,937.78 = 2,115.72/x
  3. Step 3: Cross multiply
    7,958.52x = 11,937.78 × 2,115.72
  4. Step 4: Simplify right side
    7,958.52x = 25,256,999.90
  5. Step 5: Solve for x
    x = 25,256,999.90/7,958.52
  6. Step 6: Final answer
    x = 3,173.58

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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.