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Finding the Fourth Proportional to 39,906.99, 55,069.99 and 21,757.32

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Solution

The fourth proportional to 39,906.99, 55,069.99 and 21,757.32 is: 30,024.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,906.99 : 55,069.99 = 21,757.32 : x
  2. Step 2: Convert to fraction form
    39,906.99/55,069.99 = 21,757.32/x
  3. Step 3: Cross multiply
    39,906.99x = 55,069.99 × 21,757.32
  4. Step 4: Simplify right side
    39,906.99x = 1,198,175,340.43
  5. Step 5: Solve for x
    x = 1,198,175,340.43/39,906.99
  6. Step 6: Final answer
    x = 30,024.20

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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.