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Finding the Fourth Proportional to 18,118.13, 27,188.13 and 7,729.88

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Solution

The fourth proportional to 18,118.13, 27,188.13 and 7,729.88 is: 11,599.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,118.13 : 27,188.13 = 7,729.88 : x
  2. Step 2: Convert to fraction form
    18,118.13/27,188.13 = 7,729.88/x
  3. Step 3: Cross multiply
    18,118.13x = 27,188.13 × 7,729.88
  4. Step 4: Simplify right side
    18,118.13x = 210,160,982.32
  5. Step 5: Solve for x
    x = 210,160,982.32/18,118.13
  6. Step 6: Final answer
    x = 11,599.49

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1.5x scale

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.