Home / 39,813.80-54,939.47-21,909.56

Finding the Fourth Proportional to 39,813.80, 54,939.47 and 21,909.56

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Solution

The fourth proportional to 39,813.80, 54,939.47 and 21,909.56 is: 30,233.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,813.80 : 54,939.47 = 21,909.56 : x
  2. Step 2: Convert to fraction form
    39,813.80/54,939.47 = 21,909.56/x
  3. Step 3: Cross multiply
    39,813.80x = 54,939.47 × 21,909.56
  4. Step 4: Simplify right side
    39,813.80x = 1,203,699,230.09
  5. Step 5: Solve for x
    x = 1,203,699,230.09/39,813.80
  6. Step 6: Final answer
    x = 30,233.22

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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.