Home / 20,965.43-31,448.15-5,170.43

Finding the Fourth Proportional to 20,965.43, 31,448.15 and 5,170.43

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Solution

The fourth proportional to 20,965.43, 31,448.15 and 5,170.43 is: 7,755.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,965.43 : 31,448.15 = 5,170.43 : x
  2. Step 2: Convert to fraction form
    20,965.43/31,448.15 = 5,170.43/x
  3. Step 3: Cross multiply
    20,965.43x = 31,448.15 × 5,170.43
  4. Step 4: Simplify right side
    20,965.43x = 162,600,530.36
  5. Step 5: Solve for x
    x = 162,600,530.36/20,965.43
  6. Step 6: Final answer
    x = 7,755.65

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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.