Home / 39,621.97-54,679.05-21,716.84

Finding the Fourth Proportional to 39,621.97, 54,679.05 and 21,716.84

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Solution

The fourth proportional to 39,621.97, 54,679.05 and 21,716.84 is: 29,969.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,621.97 : 54,679.05 = 21,716.84 : x
  2. Step 2: Convert to fraction form
    39,621.97/54,679.05 = 21,716.84/x
  3. Step 3: Cross multiply
    39,621.97x = 54,679.05 × 21,716.84
  4. Step 4: Simplify right side
    39,621.97x = 1,187,456,180.20
  5. Step 5: Solve for x
    x = 1,187,456,180.20/39,621.97
  6. Step 6: Final answer
    x = 29,969.64

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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.