Home / 39,755.16-54,859.46-21,849.78

Finding the Fourth Proportional to 39,755.16, 54,859.46 and 21,849.78

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Solution

The fourth proportional to 39,755.16, 54,859.46 and 21,849.78 is: 30,151.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,755.16 : 54,859.46 = 21,849.78 : x
  2. Step 2: Convert to fraction form
    39,755.16/54,859.46 = 21,849.78/x
  3. Step 3: Cross multiply
    39,755.16x = 54,859.46 × 21,849.78
  4. Step 4: Simplify right side
    39,755.16x = 1,198,667,131.92
  5. Step 5: Solve for x
    x = 1,198,667,131.92/39,755.16
  6. Step 6: Final answer
    x = 30,151.23

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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.