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Finding the Fourth Proportional to 17,868.75, 26,803.13 and 12,240.87

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Solution

The fourth proportional to 17,868.75, 26,803.13 and 12,240.87 is: 18,361.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,868.75 : 26,803.13 = 12,240.87 : x
  2. Step 2: Convert to fraction form
    17,868.75/26,803.13 = 12,240.87/x
  3. Step 3: Cross multiply
    17,868.75x = 26,803.13 × 12,240.87
  4. Step 4: Simplify right side
    17,868.75x = 328,093,629.92
  5. Step 5: Solve for x
    x = 328,093,629.92/17,868.75
  6. Step 6: Final answer
    x = 18,361.31

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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.