Home / 39,884.22-55,040.11-21,979.22

Finding the Fourth Proportional to 39,884.22, 55,040.11 and 21,979.22

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Solution

The fourth proportional to 39,884.22, 55,040.11 and 21,979.22 is: 30,331.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,884.22 : 55,040.11 = 21,979.22 : x
  2. Step 2: Convert to fraction form
    39,884.22/55,040.11 = 21,979.22/x
  3. Step 3: Cross multiply
    39,884.22x = 55,040.11 × 21,979.22
  4. Step 4: Simplify right side
    39,884.22x = 1,209,738,820.77
  5. Step 5: Solve for x
    x = 1,209,738,820.77/39,884.22
  6. Step 6: Final answer
    x = 30,331.26

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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.