Home / 39,485.52-54,486.27-21,579.39

Finding the Fourth Proportional to 39,485.52, 54,486.27 and 21,579.39

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Solution

The fourth proportional to 39,485.52, 54,486.27 and 21,579.39 is: 29,777.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,485.52 : 54,486.27 = 21,579.39 : x
  2. Step 2: Convert to fraction form
    39,485.52/54,486.27 = 21,579.39/x
  3. Step 3: Cross multiply
    39,485.52x = 54,486.27 × 21,579.39
  4. Step 4: Simplify right side
    39,485.52x = 1,175,780,469.98
  5. Step 5: Solve for x
    x = 1,175,780,469.98/39,485.52
  6. Step 6: Final answer
    x = 29,777.51

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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.