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Finding the Fourth Proportional to 6,379.61, 9,555.57 and 3,085.79

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Solution

The fourth proportional to 6,379.61, 9,555.57 and 3,085.79 is: 4,621.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,379.61 : 9,555.57 = 3,085.79 : x
  2. Step 2: Convert to fraction form
    6,379.61/9,555.57 = 3,085.79/x
  3. Step 3: Cross multiply
    6,379.61x = 9,555.57 × 3,085.79
  4. Step 4: Simplify right side
    6,379.61x = 29,486,506.24
  5. Step 5: Solve for x
    x = 29,486,506.24/6,379.61
  6. Step 6: Final answer
    x = 4,621.99

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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.