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Finding the Fourth Proportional to 18,489.84, 27,708.82 and 12,320.88

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Solution

The fourth proportional to 18,489.84, 27,708.82 and 12,320.88 is: 18,464.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,489.84 : 27,708.82 = 12,320.88 : x
  2. Step 2: Convert to fraction form
    18,489.84/27,708.82 = 12,320.88/x
  3. Step 3: Cross multiply
    18,489.84x = 27,708.82 × 12,320.88
  4. Step 4: Simplify right side
    18,489.84x = 341,397,046.16
  5. Step 5: Solve for x
    x = 341,397,046.16/18,489.84
  6. Step 6: Final answer
    x = 18,464.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.