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Finding the Fourth Proportional to 14,615.85, 20,171.85 and 8,243.75

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Solution

The fourth proportional to 14,615.85, 20,171.85 and 8,243.75 is: 11,377.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,615.85 : 20,171.85 = 8,243.75 : x
  2. Step 2: Convert to fraction form
    14,615.85/20,171.85 = 8,243.75/x
  3. Step 3: Cross multiply
    14,615.85x = 20,171.85 × 8,243.75
  4. Step 4: Simplify right side
    14,615.85x = 166,291,546.36
  5. Step 5: Solve for x
    x = 166,291,546.36/14,615.85
  6. Step 6: Final answer
    x = 11,377.48

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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.