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Finding the Fourth Proportional to 18,898.40, 28,353.96 and 8,366.96

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Solution

The fourth proportional to 18,898.40, 28,353.96 and 8,366.96 is: 12,553.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,898.40 : 28,353.96 = 8,366.96 : x
  2. Step 2: Convert to fraction form
    18,898.40/28,353.96 = 8,366.96/x
  3. Step 3: Cross multiply
    18,898.40x = 28,353.96 × 8,366.96
  4. Step 4: Simplify right side
    18,898.40x = 237,236,307.39
  5. Step 5: Solve for x
    x = 237,236,307.39/18,898.40
  6. Step 6: Final answer
    x = 12,553.25

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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.