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Finding the Fourth Proportional to 13,659.85, 18,850.29 and 7,997.95

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Solution

The fourth proportional to 13,659.85, 18,850.29 and 7,997.95 is: 11,036.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,659.85 : 18,850.29 = 7,997.95 : x
  2. Step 2: Convert to fraction form
    13,659.85/18,850.29 = 7,997.95/x
  3. Step 3: Cross multiply
    13,659.85x = 18,850.29 × 7,997.95
  4. Step 4: Simplify right side
    13,659.85x = 150,763,676.91
  5. Step 5: Solve for x
    x = 150,763,676.91/13,659.85
  6. Step 6: Final answer
    x = 11,036.99

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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.