Home / 8,129.06-11,175.04-6,990.55

Finding the Fourth Proportional to 8,129.06, 11,175.04 and 6,990.55

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Solution

The fourth proportional to 8,129.06, 11,175.04 and 6,990.55 is: 9,609.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,129.06 : 11,175.04 = 6,990.55 : x
  2. Step 2: Convert to fraction form
    8,129.06/11,175.04 = 6,990.55/x
  3. Step 3: Cross multiply
    8,129.06x = 11,175.04 × 6,990.55
  4. Step 4: Simplify right side
    8,129.06x = 78,119,699.87
  5. Step 5: Solve for x
    x = 78,119,699.87/8,129.06
  6. Step 6: Final answer
    x = 9,609.93

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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.