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Finding the Fourth Proportional to 11,405.55, 17,114.25 and 8,631.42

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Solution

The fourth proportional to 11,405.55, 17,114.25 and 8,631.42 is: 12,951.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,405.55 : 17,114.25 = 8,631.42 : x
  2. Step 2: Convert to fraction form
    11,405.55/17,114.25 = 8,631.42/x
  3. Step 3: Cross multiply
    11,405.55x = 17,114.25 × 8,631.42
  4. Step 4: Simplify right side
    11,405.55x = 147,720,279.74
  5. Step 5: Solve for x
    x = 147,720,279.74/11,405.55
  6. Step 6: Final answer
    x = 12,951.61

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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.