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Finding the Fourth Proportional to 18,659.83, 27,985.57 and 11,254.09

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Solution

The fourth proportional to 18,659.83, 27,985.57 and 11,254.09 is: 16,878.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,659.83 : 27,985.57 = 11,254.09 : x
  2. Step 2: Convert to fraction form
    18,659.83/27,985.57 = 11,254.09/x
  3. Step 3: Cross multiply
    18,659.83x = 27,985.57 × 11,254.09
  4. Step 4: Simplify right side
    18,659.83x = 314,952,123.48
  5. Step 5: Solve for x
    x = 314,952,123.48/18,659.83
  6. Step 6: Final answer
    x = 16,878.62

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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.