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Finding the Fourth Proportional to 18,231, 25,158.78 and 9,847.50

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Solution

The fourth proportional to 18,231, 25,158.78 and 9,847.50 is: 13,589.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,231 : 25,158.78 = 9,847.50 : x
  2. Step 2: Convert to fraction form
    18,231/25,158.78 = 9,847.50/x
  3. Step 3: Cross multiply
    18,231x = 25,158.78 × 9,847.50
  4. Step 4: Simplify right side
    18,231x = 247,751,086.05
  5. Step 5: Solve for x
    x = 247,751,086.05/18,231
  6. Step 6: Final answer
    x = 13,589.55

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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.