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Finding the Fourth Proportional to 38,998.84, 58,506.90 and 18,211

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Solution

The fourth proportional to 38,998.84, 58,506.90 and 18,211 is: 27,320.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,998.84 : 58,506.90 = 18,211 : x
  2. Step 2: Convert to fraction form
    38,998.84/58,506.90 = 18,211/x
  3. Step 3: Cross multiply
    38,998.84x = 58,506.90 × 18,211
  4. Step 4: Simplify right side
    38,998.84x = 1,065,469,155.90
  5. Step 5: Solve for x
    x = 1,065,469,155.90/38,998.84
  6. Step 6: Final answer
    x = 27,320.53

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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.