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Finding the Fourth Proportional to 7,819.10, 11,728.65 and 2,628.62

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Solution

The fourth proportional to 7,819.10, 11,728.65 and 2,628.62 is: 3,942.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,819.10 : 11,728.65 = 2,628.62 : x
  2. Step 2: Convert to fraction form
    7,819.10/11,728.65 = 2,628.62/x
  3. Step 3: Cross multiply
    7,819.10x = 11,728.65 × 2,628.62
  4. Step 4: Simplify right side
    7,819.10x = 30,830,150.82
  5. Step 5: Solve for x
    x = 30,830,150.82/7,819.10
  6. Step 6: Final answer
    x = 3,942.93

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Similar ratio
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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.