Home / 39,884.20-55,040.54-21,979.83

Finding the Fourth Proportional to 39,884.20, 55,040.54 and 21,979.83

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Solution

The fourth proportional to 39,884.20, 55,040.54 and 21,979.83 is: 30,332.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,884.20 : 55,040.54 = 21,979.83 : x
  2. Step 2: Convert to fraction form
    39,884.20/55,040.54 = 21,979.83/x
  3. Step 3: Cross multiply
    39,884.20x = 55,040.54 × 21,979.83
  4. Step 4: Simplify right side
    39,884.20x = 1,209,781,715.83
  5. Step 5: Solve for x
    x = 1,209,781,715.83/39,884.20
  6. Step 6: Final answer
    x = 30,332.36

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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.