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Finding the Fourth Proportional to 39,978.75, 55,175.54 and 23,211.75

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Solution

The fourth proportional to 39,978.75, 55,175.54 and 23,211.75 is: 32,035.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,978.75 : 55,175.54 = 23,211.75 : x
  2. Step 2: Convert to fraction form
    39,978.75/55,175.54 = 23,211.75/x
  3. Step 3: Cross multiply
    39,978.75x = 55,175.54 × 23,211.75
  4. Step 4: Simplify right side
    39,978.75x = 1,280,720,724.54
  5. Step 5: Solve for x
    x = 1,280,720,724.54/39,978.75
  6. Step 6: Final answer
    x = 32,035.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.