Home / 8,121.75-11,140.64-8,051.55

Finding the Fourth Proportional to 8,121.75, 11,140.64 and 8,051.55

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Solution

The fourth proportional to 8,121.75, 11,140.64 and 8,051.55 is: 11,044.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.75 : 11,140.64 = 8,051.55 : x
  2. Step 2: Convert to fraction form
    8,121.75/11,140.64 = 8,051.55/x
  3. Step 3: Cross multiply
    8,121.75x = 11,140.64 × 8,051.55
  4. Step 4: Simplify right side
    8,121.75x = 89,699,379.73
  5. Step 5: Solve for x
    x = 89,699,379.73/8,121.75
  6. Step 6: Final answer
    x = 11,044.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.