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Finding the Fourth Proportional to 14,891.91, 20,550.03 and 8,178.42

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Solution

The fourth proportional to 14,891.91, 20,550.03 and 8,178.42 is: 11,285.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,891.91 : 20,550.03 = 8,178.42 : x
  2. Step 2: Convert to fraction form
    14,891.91/20,550.03 = 8,178.42/x
  3. Step 3: Cross multiply
    14,891.91x = 20,550.03 × 8,178.42
  4. Step 4: Simplify right side
    14,891.91x = 168,066,776.35
  5. Step 5: Solve for x
    x = 168,066,776.35/14,891.91
  6. Step 6: Final answer
    x = 11,285.78

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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.