Home / 18,956.34-28,434.62-8,423.88

Finding the Fourth Proportional to 18,956.34, 28,434.62 and 8,423.88

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Solution

The fourth proportional to 18,956.34, 28,434.62 and 8,423.88 is: 12,635.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,956.34 : 28,434.62 = 8,423.88 : x
  2. Step 2: Convert to fraction form
    18,956.34/28,434.62 = 8,423.88/x
  3. Step 3: Cross multiply
    18,956.34x = 28,434.62 × 8,423.88
  4. Step 4: Simplify right side
    18,956.34x = 239,529,826.73
  5. Step 5: Solve for x
    x = 239,529,826.73/18,956.34
  6. Step 6: Final answer
    x = 12,635.87

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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.