Home / 7,990.30-11,010.40-6,186.90

Finding the Fourth Proportional to 7,990.30, 11,010.40 and 6,186.90

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Solution

The fourth proportional to 7,990.30, 11,010.40 and 6,186.90 is: 8,525.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,990.30 : 11,010.40 = 6,186.90 : x
  2. Step 2: Convert to fraction form
    7,990.30/11,010.40 = 6,186.90/x
  3. Step 3: Cross multiply
    7,990.30x = 11,010.40 × 6,186.90
  4. Step 4: Simplify right side
    7,990.30x = 68,120,243.76
  5. Step 5: Solve for x
    x = 68,120,243.76/7,990.30
  6. Step 6: Final answer
    x = 8,525.37

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.