Home / 39,920.94-55,091.16-22,015.68

Finding the Fourth Proportional to 39,920.94, 55,091.16 and 22,015.68

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Solution

The fourth proportional to 39,920.94, 55,091.16 and 22,015.68 is: 30,381.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,920.94 : 55,091.16 = 22,015.68 : x
  2. Step 2: Convert to fraction form
    39,920.94/55,091.16 = 22,015.68/x
  3. Step 3: Cross multiply
    39,920.94x = 55,091.16 × 22,015.68
  4. Step 4: Simplify right side
    39,920.94x = 1,212,869,349.39
  5. Step 5: Solve for x
    x = 1,212,869,349.39/39,920.94
  6. Step 6: Final answer
    x = 30,381.78

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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.