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Finding the Fourth Proportional to 7,269.90, 10,908.90 and 3,109.20

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Solution

The fourth proportional to 7,269.90, 10,908.90 and 3,109.20 is: 4,665.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,269.90 : 10,908.90 = 3,109.20 : x
  2. Step 2: Convert to fraction form
    7,269.90/10,908.90 = 3,109.20/x
  3. Step 3: Cross multiply
    7,269.90x = 10,908.90 × 3,109.20
  4. Step 4: Simplify right side
    7,269.90x = 33,917,951.88
  5. Step 5: Solve for x
    x = 33,917,951.88/7,269.90
  6. Step 6: Final answer
    x = 4,665.53

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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.