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Finding the Fourth Proportional to 18,288, 25,211.52 and 12,994.92

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Solution

The fourth proportional to 18,288, 25,211.52 and 12,994.92 is: 17,914.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,288 : 25,211.52 = 12,994.92 : x
  2. Step 2: Convert to fraction form
    18,288/25,211.52 = 12,994.92/x
  3. Step 3: Cross multiply
    18,288x = 25,211.52 × 12,994.92
  4. Step 4: Simplify right side
    18,288x = 327,621,685.48
  5. Step 5: Solve for x
    x = 327,621,685.48/18,288
  6. Step 6: Final answer
    x = 17,914.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.