Home / 13,151.30-18,138.74-8,372.00

Finding the Fourth Proportional to 13,151.30, 18,138.74 and 8,372.00

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Solution

The fourth proportional to 13,151.30, 18,138.74 and 8,372.00 is: 11,546.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,151.30 : 18,138.74 = 8,372.00 : x
  2. Step 2: Convert to fraction form
    13,151.30/18,138.74 = 8,372.00/x
  3. Step 3: Cross multiply
    13,151.30x = 18,138.74 × 8,372.00
  4. Step 4: Simplify right side
    13,151.30x = 151,857,398.73
  5. Step 5: Solve for x
    x = 151,857,398.73/13,151.30
  6. Step 6: Final answer
    x = 11,546.95

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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.