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Finding the Fourth Proportional to 8,448.65, 11,661.49 and 4,912.55

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Solution

The fourth proportional to 8,448.65, 11,661.49 and 4,912.55 is: 6,780.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,448.65 : 11,661.49 = 4,912.55 : x
  2. Step 2: Convert to fraction form
    8,448.65/11,661.49 = 4,912.55/x
  3. Step 3: Cross multiply
    8,448.65x = 11,661.49 × 4,912.55
  4. Step 4: Simplify right side
    8,448.65x = 57,287,658.08
  5. Step 5: Solve for x
    x = 57,287,658.08/8,448.65
  6. Step 6: Final answer
    x = 6,780.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.