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Finding the Fourth Proportional to 18,805.29, 25,936.34 and 15,982

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Solution

The fourth proportional to 18,805.29, 25,936.34 and 15,982 is: 22,042.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,805.29 : 25,936.34 = 15,982 : x
  2. Step 2: Convert to fraction form
    18,805.29/25,936.34 = 15,982/x
  3. Step 3: Cross multiply
    18,805.29x = 25,936.34 × 15,982
  4. Step 4: Simplify right side
    18,805.29x = 414,514,585.88
  5. Step 5: Solve for x
    x = 414,514,585.88/18,805.29
  6. Step 6: Final answer
    x = 22,042.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.