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Finding the Fourth Proportional to 7,191.70, 10,785.41 and 3,240.68

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Solution

The fourth proportional to 7,191.70, 10,785.41 and 3,240.68 is: 4,860.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,191.70 : 10,785.41 = 3,240.68 : x
  2. Step 2: Convert to fraction form
    7,191.70/10,785.41 = 3,240.68/x
  3. Step 3: Cross multiply
    7,191.70x = 10,785.41 × 3,240.68
  4. Step 4: Simplify right side
    7,191.70x = 34,951,992.35
  5. Step 5: Solve for x
    x = 34,951,992.35/7,191.70
  6. Step 6: Final answer
    x = 4,860.05

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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.