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Finding the Fourth Proportional to 7,182.72, 10,751.80 and 3,887.64

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Solution

The fourth proportional to 7,182.72, 10,751.80 and 3,887.64 is: 5,819.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,182.72 : 10,751.80 = 3,887.64 : x
  2. Step 2: Convert to fraction form
    7,182.72/10,751.80 = 3,887.64/x
  3. Step 3: Cross multiply
    7,182.72x = 10,751.80 × 3,887.64
  4. Step 4: Simplify right side
    7,182.72x = 41,799,105.73
  5. Step 5: Solve for x
    x = 41,799,105.73/7,182.72
  6. Step 6: Final answer
    x = 5,819.40

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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.