Home / 20,986.48-31,469.77-7,650.03

Finding the Fourth Proportional to 20,986.48, 31,469.77 and 7,650.03

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Solution

The fourth proportional to 20,986.48, 31,469.77 and 7,650.03 is: 11,471.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.48 : 31,469.77 = 7,650.03 : x
  2. Step 2: Convert to fraction form
    20,986.48/31,469.77 = 7,650.03/x
  3. Step 3: Cross multiply
    20,986.48x = 31,469.77 × 7,650.03
  4. Step 4: Simplify right side
    20,986.48x = 240,744,684.59
  5. Step 5: Solve for x
    x = 240,744,684.59/20,986.48
  6. Step 6: Final answer
    x = 11,471.42

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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.