Home / 39,902.97-55,065-21,997.98

Finding the Fourth Proportional to 39,902.97, 55,065 and 21,997.98

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Solution

The fourth proportional to 39,902.97, 55,065 and 21,997.98 is: 30,356.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,902.97 : 55,065 = 21,997.98 : x
  2. Step 2: Convert to fraction form
    39,902.97/55,065 = 21,997.98/x
  3. Step 3: Cross multiply
    39,902.97x = 55,065 × 21,997.98
  4. Step 4: Simplify right side
    39,902.97x = 1,211,318,768.70
  5. Step 5: Solve for x
    x = 1,211,318,768.70/39,902.97
  6. Step 6: Final answer
    x = 30,356.61

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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.