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Finding the Fourth Proportional to 18,115.92, 27,274.19 and 14,188.23

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Solution

The fourth proportional to 18,115.92, 27,274.19 and 14,188.23 is: 21,360.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,115.92 : 27,274.19 = 14,188.23 : x
  2. Step 2: Convert to fraction form
    18,115.92/27,274.19 = 14,188.23/x
  3. Step 3: Cross multiply
    18,115.92x = 27,274.19 × 14,188.23
  4. Step 4: Simplify right side
    18,115.92x = 386,972,409.84
  5. Step 5: Solve for x
    x = 386,972,409.84/18,115.92
  6. Step 6: Final answer
    x = 21,360.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.