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Finding the Fourth Proportional to 18,560.79, 27,835.70 and 5,409.05

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Solution

The fourth proportional to 18,560.79, 27,835.70 and 5,409.05 is: 8,111.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,560.79 : 27,835.70 = 5,409.05 : x
  2. Step 2: Convert to fraction form
    18,560.79/27,835.70 = 5,409.05/x
  3. Step 3: Cross multiply
    18,560.79x = 27,835.70 × 5,409.05
  4. Step 4: Simplify right side
    18,560.79x = 150,564,526.86
  5. Step 5: Solve for x
    x = 150,564,526.86/18,560.79
  6. Step 6: Final answer
    x = 8,111.97

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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.