Home / 39,866.28-55,015.53-21,961.36

Finding the Fourth Proportional to 39,866.28, 55,015.53 and 21,961.36

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Solution

The fourth proportional to 39,866.28, 55,015.53 and 21,961.36 is: 30,306.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,866.28 : 55,015.53 = 21,961.36 : x
  2. Step 2: Convert to fraction form
    39,866.28/55,015.53 = 21,961.36/x
  3. Step 3: Cross multiply
    39,866.28x = 55,015.53 × 21,961.36
  4. Step 4: Simplify right side
    39,866.28x = 1,208,215,859.92
  5. Step 5: Solve for x
    x = 1,208,215,859.92/39,866.28
  6. Step 6: Final answer
    x = 30,306.71

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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.