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Finding the Fourth Proportional to 14,581.73, 20,120.87 and 8,208.65

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Solution

The fourth proportional to 14,581.73, 20,120.87 and 8,208.65 is: 11,326.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,581.73 : 20,120.87 = 8,208.65 : x
  2. Step 2: Convert to fraction form
    14,581.73/20,120.87 = 8,208.65/x
  3. Step 3: Cross multiply
    14,581.73x = 20,120.87 × 8,208.65
  4. Step 4: Simplify right side
    14,581.73x = 165,165,138.48
  5. Step 5: Solve for x
    x = 165,165,138.48/14,581.73
  6. Step 6: Final answer
    x = 11,326.85

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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.