Home / 39,883.91-55,040.15-21,979.55

Finding the Fourth Proportional to 39,883.91, 55,040.15 and 21,979.55

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Solution

The fourth proportional to 39,883.91, 55,040.15 and 21,979.55 is: 30,331.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,883.91 : 55,040.15 = 21,979.55 : x
  2. Step 2: Convert to fraction form
    39,883.91/55,040.15 = 21,979.55/x
  3. Step 3: Cross multiply
    39,883.91x = 55,040.15 × 21,979.55
  4. Step 4: Simplify right side
    39,883.91x = 1,209,757,921.48
  5. Step 5: Solve for x
    x = 1,209,757,921.48/39,883.91
  6. Step 6: Final answer
    x = 30,331.98

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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.