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Finding the Fourth Proportional to 18,309.12, 25,268.12 and 10,351.88

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Solution

The fourth proportional to 18,309.12, 25,268.12 and 10,351.88 is: 14,286.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,309.12 : 25,268.12 = 10,351.88 : x
  2. Step 2: Convert to fraction form
    18,309.12/25,268.12 = 10,351.88/x
  3. Step 3: Cross multiply
    18,309.12x = 25,268.12 × 10,351.88
  4. Step 4: Simplify right side
    18,309.12x = 261,572,546.07
  5. Step 5: Solve for x
    x = 261,572,546.07/18,309.12
  6. Step 6: Final answer
    x = 14,286.46

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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.