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Finding the Fourth Proportional to 13,375.96, 18,459.12 and 8,668.42

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Solution

The fourth proportional to 13,375.96, 18,459.12 and 8,668.42 is: 11,962.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,375.96 : 18,459.12 = 8,668.42 : x
  2. Step 2: Convert to fraction form
    13,375.96/18,459.12 = 8,668.42/x
  3. Step 3: Cross multiply
    13,375.96x = 18,459.12 × 8,668.42
  4. Step 4: Simplify right side
    13,375.96x = 160,011,404.99
  5. Step 5: Solve for x
    x = 160,011,404.99/13,375.96
  6. Step 6: Final answer
    x = 11,962.61

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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.