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Finding the Fourth Proportional to 7,195.88, 10,789.49 and 2,815.40

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Solution

The fourth proportional to 7,195.88, 10,789.49 and 2,815.40 is: 4,221.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,195.88 : 10,789.49 = 2,815.40 : x
  2. Step 2: Convert to fraction form
    7,195.88/10,789.49 = 2,815.40/x
  3. Step 3: Cross multiply
    7,195.88x = 10,789.49 × 2,815.40
  4. Step 4: Simplify right side
    7,195.88x = 30,376,730.15
  5. Step 5: Solve for x
    x = 30,376,730.15/7,195.88
  6. Step 6: Final answer
    x = 4,221.41

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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.