Home / 39,383.75-54,348.99-21,478.72

Finding the Fourth Proportional to 39,383.75, 54,348.99 and 21,478.72

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Solution

The fourth proportional to 39,383.75, 54,348.99 and 21,478.72 is: 29,640.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,383.75 : 54,348.99 = 21,478.72 : x
  2. Step 2: Convert to fraction form
    39,383.75/54,348.99 = 21,478.72/x
  3. Step 3: Cross multiply
    39,383.75x = 54,348.99 × 21,478.72
  4. Step 4: Simplify right side
    39,383.75x = 1,167,346,744.80
  5. Step 5: Solve for x
    x = 1,167,346,744.80/39,383.75
  6. Step 6: Final answer
    x = 29,640.31

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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.