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Finding the Fourth Proportional to 18,188.40, 27,234 and 10,386.48

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Solution

The fourth proportional to 18,188.40, 27,234 and 10,386.48 is: 15,551.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,188.40 : 27,234 = 10,386.48 : x
  2. Step 2: Convert to fraction form
    18,188.40/27,234 = 10,386.48/x
  3. Step 3: Cross multiply
    18,188.40x = 27,234 × 10,386.48
  4. Step 4: Simplify right side
    18,188.40x = 282,865,396.32
  5. Step 5: Solve for x
    x = 282,865,396.32/18,188.40
  6. Step 6: Final answer
    x = 15,551.97

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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.