Home / 39,449.28-54,438-21,540.84

Finding the Fourth Proportional to 39,449.28, 54,438 and 21,540.84

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Solution

The fourth proportional to 39,449.28, 54,438 and 21,540.84 is: 29,725.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,449.28 : 54,438 = 21,540.84 : x
  2. Step 2: Convert to fraction form
    39,449.28/54,438 = 21,540.84/x
  3. Step 3: Cross multiply
    39,449.28x = 54,438 × 21,540.84
  4. Step 4: Simplify right side
    39,449.28x = 1,172,640,247.92
  5. Step 5: Solve for x
    x = 1,172,640,247.92/39,449.28
  6. Step 6: Final answer
    x = 29,725.26

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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.