Home / 39,884.77-55,040.97-21,979.72

Finding the Fourth Proportional to 39,884.77, 55,040.97 and 21,979.72

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Solution

The fourth proportional to 39,884.77, 55,040.97 and 21,979.72 is: 30,332.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,884.77 : 55,040.97 = 21,979.72 : x
  2. Step 2: Convert to fraction form
    39,884.77/55,040.97 = 21,979.72/x
  3. Step 3: Cross multiply
    39,884.77x = 55,040.97 × 21,979.72
  4. Step 4: Simplify right side
    39,884.77x = 1,209,785,109.13
  5. Step 5: Solve for x
    x = 1,209,785,109.13/39,884.77
  6. Step 6: Final answer
    x = 30,332.01

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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.