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Finding the Fourth Proportional to 18,198.88, 25,112.40 and 10,240.90

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Solution

The fourth proportional to 18,198.88, 25,112.40 and 10,240.90 is: 14,131.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,198.88 : 25,112.40 = 10,240.90 : x
  2. Step 2: Convert to fraction form
    18,198.88/25,112.40 = 10,240.90/x
  3. Step 3: Cross multiply
    18,198.88x = 25,112.40 × 10,240.90
  4. Step 4: Simplify right side
    18,198.88x = 257,173,475.98
  5. Step 5: Solve for x
    x = 257,173,475.98/18,198.88
  6. Step 6: Final answer
    x = 14,131.28

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1.5x scale

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.