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Finding the Fourth Proportional to 18,602.10, 27,909.09 and 12,386.43

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Solution

The fourth proportional to 18,602.10, 27,909.09 and 12,386.43 is: 18,583.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,602.10 : 27,909.09 = 12,386.43 : x
  2. Step 2: Convert to fraction form
    18,602.10/27,909.09 = 12,386.43/x
  3. Step 3: Cross multiply
    18,602.10x = 27,909.09 × 12,386.43
  4. Step 4: Simplify right side
    18,602.10x = 345,693,989.65
  5. Step 5: Solve for x
    x = 345,693,989.65/18,602.10
  6. Step 6: Final answer
    x = 18,583.60

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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.