Home / 18,135.12-27,186.48-8,769.90

Finding the Fourth Proportional to 18,135.12, 27,186.48 and 8,769.90

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Solution

The fourth proportional to 18,135.12, 27,186.48 and 8,769.90 is: 13,147.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,135.12 : 27,186.48 = 8,769.90 : x
  2. Step 2: Convert to fraction form
    18,135.12/27,186.48 = 8,769.90/x
  3. Step 3: Cross multiply
    18,135.12x = 27,186.48 × 8,769.90
  4. Step 4: Simplify right side
    18,135.12x = 238,422,710.95
  5. Step 5: Solve for x
    x = 238,422,710.95/18,135.12
  6. Step 6: Final answer
    x = 13,147.02

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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.