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Finding the Fourth Proportional to 14,469.87, 21,690.43 and 8,216.94

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Solution

The fourth proportional to 14,469.87, 21,690.43 and 8,216.94 is: 12,317.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,469.87 : 21,690.43 = 8,216.94 : x
  2. Step 2: Convert to fraction form
    14,469.87/21,690.43 = 8,216.94/x
  3. Step 3: Cross multiply
    14,469.87x = 21,690.43 × 8,216.94
  4. Step 4: Simplify right side
    14,469.87x = 178,229,022.68
  5. Step 5: Solve for x
    x = 178,229,022.68/14,469.87
  6. Step 6: Final answer
    x = 12,317.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.