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Finding the Fourth Proportional to 18,007.20, 27,018.90 and 8,141.40

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Solution

The fourth proportional to 18,007.20, 27,018.90 and 8,141.40 is: 12,215.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,007.20 : 27,018.90 = 8,141.40 : x
  2. Step 2: Convert to fraction form
    18,007.20/27,018.90 = 8,141.40/x
  3. Step 3: Cross multiply
    18,007.20x = 27,018.90 × 8,141.40
  4. Step 4: Simplify right side
    18,007.20x = 219,971,672.46
  5. Step 5: Solve for x
    x = 219,971,672.46/18,007.20
  6. Step 6: Final answer
    x = 12,215.76

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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.