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Finding the Fourth Proportional to 13,668.89, 18,867.78 and 8,005.46

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Solution

The fourth proportional to 13,668.89, 18,867.78 and 8,005.46 is: 11,050.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,668.89 : 18,867.78 = 8,005.46 : x
  2. Step 2: Convert to fraction form
    13,668.89/18,867.78 = 8,005.46/x
  3. Step 3: Cross multiply
    13,668.89x = 18,867.78 × 8,005.46
  4. Step 4: Simplify right side
    13,668.89x = 151,045,163.74
  5. Step 5: Solve for x
    x = 151,045,163.74/13,668.89
  6. Step 6: Final answer
    x = 11,050.29

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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.