Home / 20,764.40-31,128.07-7,613.70

Finding the Fourth Proportional to 20,764.40, 31,128.07 and 7,613.70

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Solution

The fourth proportional to 20,764.40, 31,128.07 and 7,613.70 is: 11,413.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,764.40 : 31,128.07 = 7,613.70 : x
  2. Step 2: Convert to fraction form
    20,764.40/31,128.07 = 7,613.70/x
  3. Step 3: Cross multiply
    20,764.40x = 31,128.07 × 7,613.70
  4. Step 4: Simplify right side
    20,764.40x = 236,999,786.56
  5. Step 5: Solve for x
    x = 236,999,786.56/20,764.40
  6. Step 6: Final answer
    x = 11,413.76

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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.