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Finding the Fourth Proportional to 16,380.75, 22,605.45 and 8,928.75

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Solution

The fourth proportional to 16,380.75, 22,605.45 and 8,928.75 is: 12,321.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,380.75 : 22,605.45 = 8,928.75 : x
  2. Step 2: Convert to fraction form
    16,380.75/22,605.45 = 8,928.75/x
  3. Step 3: Cross multiply
    16,380.75x = 22,605.45 × 8,928.75
  4. Step 4: Simplify right side
    16,380.75x = 201,838,411.69
  5. Step 5: Solve for x
    x = 201,838,411.69/16,380.75
  6. Step 6: Final answer
    x = 12,321.68

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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.