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Finding the Fourth Proportional to 14,778.83, 20,396.94 and 8,489.99

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Solution

The fourth proportional to 14,778.83, 20,396.94 and 8,489.99 is: 11,717.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,778.83 : 20,396.94 = 8,489.99 : x
  2. Step 2: Convert to fraction form
    14,778.83/20,396.94 = 8,489.99/x
  3. Step 3: Cross multiply
    14,778.83x = 20,396.94 × 8,489.99
  4. Step 4: Simplify right side
    14,778.83x = 173,169,816.63
  5. Step 5: Solve for x
    x = 173,169,816.63/14,778.83
  6. Step 6: Final answer
    x = 11,717.42

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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.