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Finding the Fourth Proportional to 18,205.28, 27,311.03 and 8,345.40

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Solution

The fourth proportional to 18,205.28, 27,311.03 and 8,345.40 is: 12,519.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,205.28 : 27,311.03 = 8,345.40 : x
  2. Step 2: Convert to fraction form
    18,205.28/27,311.03 = 8,345.40/x
  3. Step 3: Cross multiply
    18,205.28x = 27,311.03 × 8,345.40
  4. Step 4: Simplify right side
    18,205.28x = 227,921,428.04
  5. Step 5: Solve for x
    x = 227,921,428.04/18,205.28
  6. Step 6: Final answer
    x = 12,519.53

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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.