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Finding the Fourth Proportional to 18,245.67, 25,178.97 and 10,287.84

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Solution

The fourth proportional to 18,245.67, 25,178.97 and 10,287.84 is: 14,197.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,245.67 : 25,178.97 = 10,287.84 : x
  2. Step 2: Convert to fraction form
    18,245.67/25,178.97 = 10,287.84/x
  3. Step 3: Cross multiply
    18,245.67x = 25,178.97 × 10,287.84
  4. Step 4: Simplify right side
    18,245.67x = 259,037,214.72
  5. Step 5: Solve for x
    x = 259,037,214.72/18,245.67
  6. Step 6: Final answer
    x = 14,197.19

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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.