Home / 39,738.72-54,839.78-21,834.12

Finding the Fourth Proportional to 39,738.72, 54,839.78 and 21,834.12

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Solution

The fourth proportional to 39,738.72, 54,839.78 and 21,834.12 is: 30,131.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,738.72 : 54,839.78 = 21,834.12 : x
  2. Step 2: Convert to fraction form
    39,738.72/54,839.78 = 21,834.12/x
  3. Step 3: Cross multiply
    39,738.72x = 54,839.78 × 21,834.12
  4. Step 4: Simplify right side
    39,738.72x = 1,197,378,337.29
  5. Step 5: Solve for x
    x = 1,197,378,337.29/39,738.72
  6. Step 6: Final answer
    x = 30,131.28

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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.