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Finding the Fourth Proportional to 7,265.90, 10,902.90 and 3,105.20

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Solution

The fourth proportional to 7,265.90, 10,902.90 and 3,105.20 is: 4,659.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,265.90 : 10,902.90 = 3,105.20 : x
  2. Step 2: Convert to fraction form
    7,265.90/10,902.90 = 3,105.20/x
  3. Step 3: Cross multiply
    7,265.90x = 10,902.90 × 3,105.20
  4. Step 4: Simplify right side
    7,265.90x = 33,855,685.08
  5. Step 5: Solve for x
    x = 33,855,685.08/7,265.90
  6. Step 6: Final answer
    x = 4,659.53

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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.