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Finding the Fourth Proportional to 20,606.08, 30,903.36 and 8,918.08

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Solution

The fourth proportional to 20,606.08, 30,903.36 and 8,918.08 is: 13,374.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,606.08 : 30,903.36 = 8,918.08 : x
  2. Step 2: Convert to fraction form
    20,606.08/30,903.36 = 8,918.08/x
  3. Step 3: Cross multiply
    20,606.08x = 30,903.36 × 8,918.08
  4. Step 4: Simplify right side
    20,606.08x = 275,598,636.75
  5. Step 5: Solve for x
    x = 275,598,636.75/20,606.08
  6. Step 6: Final answer
    x = 13,374.63

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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.