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Finding the Fourth Proportional to 8,379.75, 11,585.67 and 8,012.55

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Solution

The fourth proportional to 8,379.75, 11,585.67 and 8,012.55 is: 11,077.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,379.75 : 11,585.67 = 8,012.55 : x
  2. Step 2: Convert to fraction form
    8,379.75/11,585.67 = 8,012.55/x
  3. Step 3: Cross multiply
    8,379.75x = 11,585.67 × 8,012.55
  4. Step 4: Simplify right side
    8,379.75x = 92,830,760.16
  5. Step 5: Solve for x
    x = 92,830,760.16/8,379.75
  6. Step 6: Final answer
    x = 11,077.99

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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.