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Finding the Fourth Proportional to 18,305.80, 27,456.25 and 5,159.20

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Solution

The fourth proportional to 18,305.80, 27,456.25 and 5,159.20 is: 7,738.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,305.80 : 27,456.25 = 5,159.20 : x
  2. Step 2: Convert to fraction form
    18,305.80/27,456.25 = 5,159.20/x
  3. Step 3: Cross multiply
    18,305.80x = 27,456.25 × 5,159.20
  4. Step 4: Simplify right side
    18,305.80x = 141,652,285
  5. Step 5: Solve for x
    x = 141,652,285/18,305.80
  6. Step 6: Final answer
    x = 7,738.11

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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.