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Finding the Fourth Proportional to 6,385.65, 8,811.91 and 3,552.80

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Solution

The fourth proportional to 6,385.65, 8,811.91 and 3,552.80 is: 4,902.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,385.65 : 8,811.91 = 3,552.80 : x
  2. Step 2: Convert to fraction form
    6,385.65/8,811.91 = 3,552.80/x
  3. Step 3: Cross multiply
    6,385.65x = 8,811.91 × 3,552.80
  4. Step 4: Simplify right side
    6,385.65x = 31,306,967.00
  5. Step 5: Solve for x
    x = 31,306,967.00/6,385.65
  6. Step 6: Final answer
    x = 4,902.71

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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.