Home / 39,902.94-55,065.33-21,999.60

Finding the Fourth Proportional to 39,902.94, 55,065.33 and 21,999.60

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Solution

The fourth proportional to 39,902.94, 55,065.33 and 21,999.60 is: 30,359.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,902.94 : 55,065.33 = 21,999.60 : x
  2. Step 2: Convert to fraction form
    39,902.94/55,065.33 = 21,999.60/x
  3. Step 3: Cross multiply
    39,902.94x = 55,065.33 × 21,999.60
  4. Step 4: Simplify right side
    39,902.94x = 1,211,415,233.87
  5. Step 5: Solve for x
    x = 1,211,415,233.87/39,902.94
  6. Step 6: Final answer
    x = 30,359.05

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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.