Home / 20,720.88-31,032.72-18,229.32

Finding the Fourth Proportional to 20,720.88, 31,032.72 and 18,229.32

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Solution

The fourth proportional to 20,720.88, 31,032.72 and 18,229.32 is: 27,301.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.88 : 31,032.72 = 18,229.32 : x
  2. Step 2: Convert to fraction form
    20,720.88/31,032.72 = 18,229.32/x
  3. Step 3: Cross multiply
    20,720.88x = 31,032.72 × 18,229.32
  4. Step 4: Simplify right side
    20,720.88x = 565,705,383.35
  5. Step 5: Solve for x
    x = 565,705,383.35/20,720.88
  6. Step 6: Final answer
    x = 27,301.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.