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Finding the Fourth Proportional to 18,217.80, 27,326.70 and 12,342.60

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Solution

The fourth proportional to 18,217.80, 27,326.70 and 12,342.60 is: 18,513.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,217.80 : 27,326.70 = 12,342.60 : x
  2. Step 2: Convert to fraction form
    18,217.80/27,326.70 = 12,342.60/x
  3. Step 3: Cross multiply
    18,217.80x = 27,326.70 × 12,342.60
  4. Step 4: Simplify right side
    18,217.80x = 337,282,527.42
  5. Step 5: Solve for x
    x = 337,282,527.42/18,217.80
  6. Step 6: Final answer
    x = 18,513.90

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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.