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Finding the Fourth Proportional to 7,167.20, 10,763.60 and 5,221.60

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Solution

The fourth proportional to 7,167.20, 10,763.60 and 5,221.60 is: 7,841.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,167.20 : 10,763.60 = 5,221.60 : x
  2. Step 2: Convert to fraction form
    7,167.20/10,763.60 = 5,221.60/x
  3. Step 3: Cross multiply
    7,167.20x = 10,763.60 × 5,221.60
  4. Step 4: Simplify right side
    7,167.20x = 56,203,213.76
  5. Step 5: Solve for x
    x = 56,203,213.76/7,167.20
  6. Step 6: Final answer
    x = 7,841.73

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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.