Home / 39,884.36-55,037.81-21,979.37

Finding the Fourth Proportional to 39,884.36, 55,037.81 and 21,979.37

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Solution

The fourth proportional to 39,884.36, 55,037.81 and 21,979.37 is: 30,330.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,884.36 : 55,037.81 = 21,979.37 : x
  2. Step 2: Convert to fraction form
    39,884.36/55,037.81 = 21,979.37/x
  3. Step 3: Cross multiply
    39,884.36x = 55,037.81 × 21,979.37
  4. Step 4: Simplify right side
    39,884.36x = 1,209,696,114.79
  5. Step 5: Solve for x
    x = 1,209,696,114.79/39,884.36
  6. Step 6: Final answer
    x = 30,330.09

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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.