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Finding the Fourth Proportional to 18,211.16, 27,299.70 and 8,340.50

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Solution

The fourth proportional to 18,211.16, 27,299.70 and 8,340.50 is: 12,502.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,211.16 : 27,299.70 = 8,340.50 : x
  2. Step 2: Convert to fraction form
    18,211.16/27,299.70 = 8,340.50/x
  3. Step 3: Cross multiply
    18,211.16x = 27,299.70 × 8,340.50
  4. Step 4: Simplify right side
    18,211.16x = 227,693,147.85
  5. Step 5: Solve for x
    x = 227,693,147.85/18,211.16
  6. Step 6: Final answer
    x = 12,502.95

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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.