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Finding the Fourth Proportional to 18,499.68, 27,750.06 and 5,355

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Solution

The fourth proportional to 18,499.68, 27,750.06 and 5,355 is: 8,032.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,499.68 : 27,750.06 = 5,355 : x
  2. Step 2: Convert to fraction form
    18,499.68/27,750.06 = 5,355/x
  3. Step 3: Cross multiply
    18,499.68x = 27,750.06 × 5,355
  4. Step 4: Simplify right side
    18,499.68x = 148,601,571.30
  5. Step 5: Solve for x
    x = 148,601,571.30/18,499.68
  6. Step 6: Final answer
    x = 8,032.66

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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.