Home / 39,879.54-55,031.64-21,974.10

Finding the Fourth Proportional to 39,879.54, 55,031.64 and 21,974.10

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Solution

The fourth proportional to 39,879.54, 55,031.64 and 21,974.10 is: 30,323.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,879.54 : 55,031.64 = 21,974.10 : x
  2. Step 2: Convert to fraction form
    39,879.54/55,031.64 = 21,974.10/x
  3. Step 3: Cross multiply
    39,879.54x = 55,031.64 × 21,974.10
  4. Step 4: Simplify right side
    39,879.54x = 1,209,270,760.52
  5. Step 5: Solve for x
    x = 1,209,270,760.52/39,879.54
  6. Step 6: Final answer
    x = 30,323.09

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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.