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Finding the Fourth Proportional to 20,608.65, 30,913.08 and 8,759.37

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Solution

The fourth proportional to 20,608.65, 30,913.08 and 8,759.37 is: 13,139.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,608.65 : 30,913.08 = 8,759.37 : x
  2. Step 2: Convert to fraction form
    20,608.65/30,913.08 = 8,759.37/x
  3. Step 3: Cross multiply
    20,608.65x = 30,913.08 × 8,759.37
  4. Step 4: Simplify right side
    20,608.65x = 270,779,105.56
  5. Step 5: Solve for x
    x = 270,779,105.56/20,608.65
  6. Step 6: Final answer
    x = 13,139.10

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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.