Home / 20,759.40-31,120.20-7,608.60

Finding the Fourth Proportional to 20,759.40, 31,120.20 and 7,608.60

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Solution

The fourth proportional to 20,759.40, 31,120.20 and 7,608.60 is: 11,405.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,759.40 : 31,120.20 = 7,608.60 : x
  2. Step 2: Convert to fraction form
    20,759.40/31,120.20 = 7,608.60/x
  3. Step 3: Cross multiply
    20,759.40x = 31,120.20 × 7,608.60
  4. Step 4: Simplify right side
    20,759.40x = 236,781,153.72
  5. Step 5: Solve for x
    x = 236,781,153.72/20,759.40
  6. Step 6: Final answer
    x = 11,405.97

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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.