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Finding the Fourth Proportional to 7,906.80, 11,835.30 and 5,427.12

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Solution

The fourth proportional to 7,906.80, 11,835.30 and 5,427.12 is: 8,123.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,906.80 : 11,835.30 = 5,427.12 : x
  2. Step 2: Convert to fraction form
    7,906.80/11,835.30 = 5,427.12/x
  3. Step 3: Cross multiply
    7,906.80x = 11,835.30 × 5,427.12
  4. Step 4: Simplify right side
    7,906.80x = 64,231,593.34
  5. Step 5: Solve for x
    x = 64,231,593.34/7,906.80
  6. Step 6: Final answer
    x = 8,123.59

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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.