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Finding the Fourth Proportional to 7,757.65, 11,630.79 and 2,489.65

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Solution

The fourth proportional to 7,757.65, 11,630.79 and 2,489.65 is: 3,732.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,757.65 : 11,630.79 = 2,489.65 : x
  2. Step 2: Convert to fraction form
    7,757.65/11,630.79 = 2,489.65/x
  3. Step 3: Cross multiply
    7,757.65x = 11,630.79 × 2,489.65
  4. Step 4: Simplify right side
    7,757.65x = 28,956,596.32
  5. Step 5: Solve for x
    x = 28,956,596.32/7,757.65
  6. Step 6: Final answer
    x = 3,732.65

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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.