Home / 39,879.45-55,036.06-21,974.43

Finding the Fourth Proportional to 39,879.45, 55,036.06 and 21,974.43

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Solution

The fourth proportional to 39,879.45, 55,036.06 and 21,974.43 is: 30,326.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,879.45 : 55,036.06 = 21,974.43 : x
  2. Step 2: Convert to fraction form
    39,879.45/55,036.06 = 21,974.43/x
  3. Step 3: Cross multiply
    39,879.45x = 55,036.06 × 21,974.43
  4. Step 4: Simplify right side
    39,879.45x = 1,209,386,199.39
  5. Step 5: Solve for x
    x = 1,209,386,199.39/39,879.45
  6. Step 6: Final answer
    x = 30,326.05

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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.