Home / 39,883.82-55,040.03-21,979.46

Finding the Fourth Proportional to 39,883.82, 55,040.03 and 21,979.46

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Solution

The fourth proportional to 39,883.82, 55,040.03 and 21,979.46 is: 30,331.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,883.82 : 55,040.03 = 21,979.46 : x
  2. Step 2: Convert to fraction form
    39,883.82/55,040.03 = 21,979.46/x
  3. Step 3: Cross multiply
    39,883.82x = 55,040.03 × 21,979.46
  4. Step 4: Simplify right side
    39,883.82x = 1,209,750,027.89
  5. Step 5: Solve for x
    x = 1,209,750,027.89/39,883.82
  6. Step 6: Final answer
    x = 30,331.85

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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.