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Finding the Fourth Proportional to 18,335.76, 27,478.80 and 8,328.04

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Solution

The fourth proportional to 18,335.76, 27,478.80 and 8,328.04 is: 12,480.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,335.76 : 27,478.80 = 8,328.04 : x
  2. Step 2: Convert to fraction form
    18,335.76/27,478.80 = 8,328.04/x
  3. Step 3: Cross multiply
    18,335.76x = 27,478.80 × 8,328.04
  4. Step 4: Simplify right side
    18,335.76x = 228,844,545.55
  5. Step 5: Solve for x
    x = 228,844,545.55/18,335.76
  6. Step 6: Final answer
    x = 12,480.78

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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.