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Finding the Fourth Proportional to 18,632.80, 25,713.04 and 10,249.28

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Solution

The fourth proportional to 18,632.80, 25,713.04 and 10,249.28 is: 14,143.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,632.80 : 25,713.04 = 10,249.28 : x
  2. Step 2: Convert to fraction form
    18,632.80/25,713.04 = 10,249.28/x
  3. Step 3: Cross multiply
    18,632.80x = 25,713.04 × 10,249.28
  4. Step 4: Simplify right side
    18,632.80x = 263,540,146.61
  5. Step 5: Solve for x
    x = 263,540,146.61/18,632.80
  6. Step 6: Final answer
    x = 14,143.88

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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.