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Finding the Fourth Proportional to 12,797.75, 17,654.15 and 8,811.95

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Solution

The fourth proportional to 12,797.75, 17,654.15 and 8,811.95 is: 12,155.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,797.75 : 17,654.15 = 8,811.95 : x
  2. Step 2: Convert to fraction form
    12,797.75/17,654.15 = 8,811.95/x
  3. Step 3: Cross multiply
    12,797.75x = 17,654.15 × 8,811.95
  4. Step 4: Simplify right side
    12,797.75x = 155,567,420.85
  5. Step 5: Solve for x
    x = 155,567,420.85/12,797.75
  6. Step 6: Final answer
    x = 12,155.84

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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.