Home / 39,902.19-55,065.41-21,997.90

Finding the Fourth Proportional to 39,902.19, 55,065.41 and 21,997.90

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Solution

The fourth proportional to 39,902.19, 55,065.41 and 21,997.90 is: 30,357.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,902.19 : 55,065.41 = 21,997.90 : x
  2. Step 2: Convert to fraction form
    39,902.19/55,065.41 = 21,997.90/x
  3. Step 3: Cross multiply
    39,902.19x = 55,065.41 × 21,997.90
  4. Step 4: Simplify right side
    39,902.19x = 1,211,323,382.64
  5. Step 5: Solve for x
    x = 1,211,323,382.64/39,902.19
  6. Step 6: Final answer
    x = 30,357.32

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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.