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Finding the Fourth Proportional to 6,670.44, 10,003.68 and 1,990.80

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Solution

The fourth proportional to 6,670.44, 10,003.68 and 1,990.80 is: 2,985.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,670.44 : 10,003.68 = 1,990.80 : x
  2. Step 2: Convert to fraction form
    6,670.44/10,003.68 = 1,990.80/x
  3. Step 3: Cross multiply
    6,670.44x = 10,003.68 × 1,990.80
  4. Step 4: Simplify right side
    6,670.44x = 19,915,326.14
  5. Step 5: Solve for x
    x = 19,915,326.14/6,670.44
  6. Step 6: Final answer
    x = 2,985.61

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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.