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Finding the Fourth Proportional to 18,436.80, 27,649.80 and 8,573.70

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Solution

The fourth proportional to 18,436.80, 27,649.80 and 8,573.70 is: 12,858.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,436.80 : 27,649.80 = 8,573.70 : x
  2. Step 2: Convert to fraction form
    18,436.80/27,649.80 = 8,573.70/x
  3. Step 3: Cross multiply
    18,436.80x = 27,649.80 × 8,573.70
  4. Step 4: Simplify right side
    18,436.80x = 237,061,090.26
  5. Step 5: Solve for x
    x = 237,061,090.26/18,436.80
  6. Step 6: Final answer
    x = 12,858.04

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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.