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Finding the Fourth Proportional to 18,840.90, 28,277.55 and 8,327.10

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Solution

The fourth proportional to 18,840.90, 28,277.55 and 8,327.10 is: 12,497.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,840.90 : 28,277.55 = 8,327.10 : x
  2. Step 2: Convert to fraction form
    18,840.90/28,277.55 = 8,327.10/x
  3. Step 3: Cross multiply
    18,840.90x = 28,277.55 × 8,327.10
  4. Step 4: Simplify right side
    18,840.90x = 235,469,986.61
  5. Step 5: Solve for x
    x = 235,469,986.61/18,840.90
  6. Step 6: Final answer
    x = 12,497.81

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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.