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Finding the Fourth Proportional to 18,809.34, 25,956.72 and 10,311.95

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Solution

The fourth proportional to 18,809.34, 25,956.72 and 10,311.95 is: 14,230.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,809.34 : 25,956.72 = 10,311.95 : x
  2. Step 2: Convert to fraction form
    18,809.34/25,956.72 = 10,311.95/x
  3. Step 3: Cross multiply
    18,809.34x = 25,956.72 × 10,311.95
  4. Step 4: Simplify right side
    18,809.34x = 267,664,398.80
  5. Step 5: Solve for x
    x = 267,664,398.80/18,809.34
  6. Step 6: Final answer
    x = 14,230.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.