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Finding the Fourth Proportional to 14,891.90, 20,550.02 and 8,178.44

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Solution

The fourth proportional to 14,891.90, 20,550.02 and 8,178.44 is: 11,285.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,891.90 : 20,550.02 = 8,178.44 : x
  2. Step 2: Convert to fraction form
    14,891.90/20,550.02 = 8,178.44/x
  3. Step 3: Cross multiply
    14,891.90x = 20,550.02 × 8,178.44
  4. Step 4: Simplify right side
    14,891.90x = 168,066,961.93
  5. Step 5: Solve for x
    x = 168,066,961.93/14,891.90
  6. Step 6: Final answer
    x = 11,285.80

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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.