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Finding the Fourth Proportional to 20,641.56, 30,961.98 and 5,059.32

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Solution

The fourth proportional to 20,641.56, 30,961.98 and 5,059.32 is: 7,588.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,641.56 : 30,961.98 = 5,059.32 : x
  2. Step 2: Convert to fraction form
    20,641.56/30,961.98 = 5,059.32/x
  3. Step 3: Cross multiply
    20,641.56x = 30,961.98 × 5,059.32
  4. Step 4: Simplify right side
    20,641.56x = 156,646,564.65
  5. Step 5: Solve for x
    x = 156,646,564.65/20,641.56
  6. Step 6: Final answer
    x = 7,588.89

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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.