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Finding the Fourth Proportional to 18,510.97, 25,548.43 and 10,961.49

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Solution

The fourth proportional to 18,510.97, 25,548.43 and 10,961.49 is: 15,128.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,510.97 : 25,548.43 = 10,961.49 : x
  2. Step 2: Convert to fraction form
    18,510.97/25,548.43 = 10,961.49/x
  3. Step 3: Cross multiply
    18,510.97x = 25,548.43 × 10,961.49
  4. Step 4: Simplify right side
    18,510.97x = 280,048,859.96
  5. Step 5: Solve for x
    x = 280,048,859.96/18,510.97
  6. Step 6: Final answer
    x = 15,128.81

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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.