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Finding the Fourth Proportional to 18,090, 27,101.25 and 10,672.43

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Solution

The fourth proportional to 18,090, 27,101.25 and 10,672.43 is: 15,988.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,090 : 27,101.25 = 10,672.43 : x
  2. Step 2: Convert to fraction form
    18,090/27,101.25 = 10,672.43/x
  3. Step 3: Cross multiply
    18,090x = 27,101.25 × 10,672.43
  4. Step 4: Simplify right side
    18,090x = 289,236,058.03
  5. Step 5: Solve for x
    x = 289,236,058.03/18,090
  6. Step 6: Final answer
    x = 15,988.73

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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.