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Finding the Fourth Proportional to 39,642.90, 54,735.90 and 25,520.34

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Solution

The fourth proportional to 39,642.90, 54,735.90 and 25,520.34 is: 35,236.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,642.90 : 54,735.90 = 25,520.34 : x
  2. Step 2: Convert to fraction form
    39,642.90/54,735.90 = 25,520.34/x
  3. Step 3: Cross multiply
    39,642.90x = 54,735.90 × 25,520.34
  4. Step 4: Simplify right side
    39,642.90x = 1,396,878,778.21
  5. Step 5: Solve for x
    x = 1,396,878,778.21/39,642.90
  6. Step 6: Final answer
    x = 35,236.54

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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.