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Finding the Fourth Proportional to 20,110.56, 30,126.60 and 13,164

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Solution

The fourth proportional to 20,110.56, 30,126.60 and 13,164 is: 19,720.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,110.56 : 30,126.60 = 13,164 : x
  2. Step 2: Convert to fraction form
    20,110.56/30,126.60 = 13,164/x
  3. Step 3: Cross multiply
    20,110.56x = 30,126.60 × 13,164
  4. Step 4: Simplify right side
    20,110.56x = 396,586,562.40
  5. Step 5: Solve for x
    x = 396,586,562.40/20,110.56
  6. Step 6: Final answer
    x = 19,720.31

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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.