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Finding the Fourth Proportional to 18,385.22, 27,581.95 and 5,905.95

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Solution

The fourth proportional to 18,385.22, 27,581.95 and 5,905.95 is: 8,860.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,385.22 : 27,581.95 = 5,905.95 : x
  2. Step 2: Convert to fraction form
    18,385.22/27,581.95 = 5,905.95/x
  3. Step 3: Cross multiply
    18,385.22x = 27,581.95 × 5,905.95
  4. Step 4: Simplify right side
    18,385.22x = 162,897,617.60
  5. Step 5: Solve for x
    x = 162,897,617.60/18,385.22
  6. Step 6: Final answer
    x = 8,860.25

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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.