Home / 39,433.38-54,418.20-21,528.78

Finding the Fourth Proportional to 39,433.38, 54,418.20 and 21,528.78

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Solution

The fourth proportional to 39,433.38, 54,418.20 and 21,528.78 is: 29,709.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,433.38 : 54,418.20 = 21,528.78 : x
  2. Step 2: Convert to fraction form
    39,433.38/54,418.20 = 21,528.78/x
  3. Step 3: Cross multiply
    39,433.38x = 54,418.20 × 21,528.78
  4. Step 4: Simplify right side
    39,433.38x = 1,171,557,455.80
  5. Step 5: Solve for x
    x = 1,171,557,455.80/39,433.38
  6. Step 6: Final answer
    x = 29,709.79

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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.