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Finding the Fourth Proportional to 18,447.28, 27,670.93 and 7,910.49

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Solution

The fourth proportional to 18,447.28, 27,670.93 and 7,910.49 is: 11,865.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,447.28 : 27,670.93 = 7,910.49 : x
  2. Step 2: Convert to fraction form
    18,447.28/27,670.93 = 7,910.49/x
  3. Step 3: Cross multiply
    18,447.28x = 27,670.93 × 7,910.49
  4. Step 4: Simplify right side
    18,447.28x = 218,890,699.05
  5. Step 5: Solve for x
    x = 218,890,699.05/18,447.28
  6. Step 6: Final answer
    x = 11,865.75

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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.