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Finding the Fourth Proportional to 18,206.78, 27,288.90 and 8,347.05

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Solution

The fourth proportional to 18,206.78, 27,288.90 and 8,347.05 is: 12,510.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,206.78 : 27,288.90 = 8,347.05 : x
  2. Step 2: Convert to fraction form
    18,206.78/27,288.90 = 8,347.05/x
  3. Step 3: Cross multiply
    18,206.78x = 27,288.90 × 8,347.05
  4. Step 4: Simplify right side
    18,206.78x = 227,781,812.75
  5. Step 5: Solve for x
    x = 227,781,812.75/18,206.78
  6. Step 6: Final answer
    x = 12,510.83

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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.